Documentation: Add RetroArch emu to SNES games (#365)

* Documentation: Add RetroArch emu to SNES games

* Documentation: fix screenshot alt text

WebHostLib/static/assets/tutorial/A Link to the Past/multiworld_en.md

@@ -10,7 +10,8 @@
 - Hardware or software capable of loading and playing SNES ROM files
     - An emulator capable of connecting to SNI
       ([snes9x rr](https://github.com/gocha/snes9x-rr/releases),
-      [BizHawk](http://tasvideos.org/BizHawk.html))
+       [BizHawk](http://tasvideos.org/BizHawk.html), or
+       [RetroArch](https://retroarch.com?page=platforms) 1.10.1 or newer). Or,
     - An SD2SNES, [FXPak Pro](https://krikzz.com/store/home/54-fxpak-pro.html), or other compatible hardware
 - Your Japanese v1.0 ROM file, probably named `Zelda no Densetsu - Kamigami no Triforce (Japan).sfc`
 
@@ -102,6 +103,21 @@ first time launching, you may be prompted to allow it to communicate through the
     - SNIClient users should look in their Archipelago folder for `/SNI/lua/x64` or `/SNI/lua/x86` depending on if the
       emulator is 64-bit or 32-bit.
 
+##### RetroArch 1.10.1 or newer
+
+You only have to do these steps once.
+
+1. Enter the RetroArch main menu screen.
+2. Go to Settings --> User Interface. Set "Show Advanced Settings" to ON.
+3. Go to Settings --> Network. Set "Network Commands" to ON. (It is found below Request Device 16.) Leave the default
+   Network Command Port at 55355.
+![Screenshot of Network Commands setting](/static/assets/tutorial/retroarch-network-commands-en.png)
+4. Go to Main Menu --> Online Updater --> Core Downloader. Scroll down and select "Nintendo - SNES / SFC (bsnes-mercury
+   Performance)".
+
+When loading a ROM, be sure to select a **bsnes-mercury** core. These are the only cores that allow external tools to
+read ROM data.
+
 #### With hardware
 
 This guide assumes you have downloaded the correct firmware for your device. If you have not done so already, please do

WebHostLib/static/assets/tutorial/A Link to the Past/multiworld_es.md

@@ -13,7 +13,8 @@
 - Hardware o software capaz de cargar y ejecutar archivos de ROM de SNES
     - Un emulador capaz de ejecutar scripts Lua
       ([snes9x Multitroid](https://drive.google.com/drive/folders/1_ej-pwWtCAHYXIrvs5Hro16A1s9Hi3Jz),
-      [BizHawk](http://tasvideos.org/BizHawk.html))
+       [BizHawk](http://tasvideos.org/BizHawk.html), o
+       [RetroArch](https://retroarch.com?page=platforms) 1.10.1 o más nuevo). O,
     - Un flashcart SD2SNES, [FXPak Pro](https://krikzz.com/store/home/54-fxpak-pro.html), o otro hardware compatible
 - Tu archivo ROM japones v1.0, probablemente se llame `Zelda no Densetsu - Kamigami no Triforce (Japan).sfc`
 
@@ -135,6 +136,21 @@ ejecutas, puedes ser que el firewall de Windows te pregunte si le permites la co
 7. Observa que se ha asignado un nombre al dispositivo, y el cliente muestra "SNES Device: Connected", con el mismo
    nombre en la esquina superior izquierda.
 
+##### RetroArch 1.10.1 o más nuevo
+
+Sólo hay que segiur estos pasos una vez.
+
+1. Comienza en la pantalla del menú principal de RetroArch.
+2. Ve a Ajustes --> Interfaz de usario. Configura "Mostrar ajustes avanzados" en ON.
+3. Ve a Ajustes --> Red. Configura "Comandos de red" en ON. (Se encuentra bajo Request Device 16.) Deja en 55355 (el
+   default) el Puerto de comandos de red.
+![Captura de pantalla del ajuste Comandos de red](/static/assets/tutorial/retroarch-network-commands-en.png)
+4. Ve a Menú principal --> Actualizador en línea --> Descargador de núcleos. Desplázate y selecciona "Nintendo - SNES /
+   SFC (bsnes-mercury Performance)".
+
+Cuando cargas un ROM, asegúrate de seleccionar un núcleo **bsnes-mercury**. Estos son los sólos núcleos que permiten
+que herramientas externas lean datos del ROM.
+
 #### Con Hardware
 
 Esta guía asume que ya has descargado el firmware correcto para tu dispositivo. Si no lo has hecho ya, hazlo ahora. Los
@@ -203,4 +219,4 @@ El programa recomentdado actualmente es:
 4. Si quieres que las llaves y los objetos de mazmorra tambien sean marcados, activa la caja con nombre **Race Illegal
    Tracking**
 5. Haz click en el boton **Start Autotracking**
-6. Cierra la ventana AutoTracker, ya que deja de ser necesaria
+6. Cierra la ventana AutoTracker, ya que deja de ser necesaria

WebHostLib/static/assets/tutorial/SMZ3/multiworld_en.md

@@ -11,6 +11,8 @@
         - snes9x Multitroid
           from: [snes9x Multitroid Download](https://drive.google.com/drive/folders/1_ej-pwWtCAHYXIrvs5Hro16A1s9Hi3Jz),
         - BizHawk from: [BizHawk Website](http://tasvideos.org/BizHawk.html)
+        - RetroArch 1.10.3 or newer from: [RetroArch BuildBot Website](https://buildbot.libretro.com/) - nightly builds
+          are required until 1.10.3 is released. Or,
     - An SD2SNES, FXPak Pro ([FXPak Pro Store Page](https://krikzz.com/store/home/54-fxpak-pro.html)), or other
       compatible hardware
 - Your legally obtained Super Metroid ROM file, probably named `Super Metroid (Japan, USA).sfc` and
@@ -103,6 +105,21 @@ first time launching, you may be prompted to allow it to communicate through the
     - SNIClient users should look in their Archipelago folder for `/SNI/lua/x64` or `/SNI/lua/x86` depending on if the
       emulator is 64-bit or 32-bit. Please note the most recent versions of BizHawk are 64-bit only.
 
+##### RetroArch 1.10.3 or newer
+
+You only have to do these steps once. Note, RetroArch 1.9.x will not work as it is older than 1.10.3.
+
+1. Enter the RetroArch main menu screen.
+2. Go to Settings --> User Interface. Set "Show Advanced Settings" to ON.
+3. Go to Settings --> Network. Set "Network Commands" to ON. (It is found below Request Device 16.) Leave the default
+   Network Command Port at 55355.
+![Screenshot of Network Commands setting](/static/assets/tutorial/retroarch-network-commands-en.png)
+4. Go to Main Menu --> Online Updater --> Core Downloader. Scroll down and select "Nintendo - SNES / SFC (bsnes-mercury
+   Performance)".
+
+When loading a ROM, be sure to select a **bsnes-mercury** core. These are the only cores that allow external tools to
+read ROM data.
+
 #### With hardware
 
 This guide assumes you have downloaded the correct firmware for your device. If you have not done so already, please do

WebHostLib/static/assets/tutorial/Secret of Evermore/multiworld_en.md

@@ -9,6 +9,7 @@
         - snes9x-rr from: [snes9x-rr Releases Page](https://github.com/gocha/snes9x-rr/releases)
         - BizHawk from: [BizHawk Website](http://tasvideos.org/BizHawk.html)
         - bsnes-plus-nwa from: [bsnes-plus GitHub](https://github.com/black-sliver/bsnes-plus)
+        - RetroArch from: [RetroArch Website](https://retroarch.com?page=platforms). Or,
     - Or SD2SNES, FXPak Pro ([FXPak Pro Store Page](https://krikzz.com/store/home/54-fxpak-pro.html)), or other
       compatible hardware.
 - Your legally obtained Secret of Evermore US ROM file, probably named `Secret of Evermore (USA).sfc`
@@ -92,6 +93,21 @@ you may be prompted to allow it to communicate through the Windows Firewall.
 This should automatically connect to SNI. If this is its first time launching, you may be prompted to allow it to
 communicate through the Windows Firewall.
 
+##### RetroArch
+
+You only have to do these steps once.
+
+1. Enter the RetroArch main menu screen.
+2. Go to Settings --> User Interface. Set "Show Advanced Settings" to ON.
+3. Go to Settings --> Network. Set "Network Commands" to ON. (It is found below Request Device 16.) Leave the default
+   Network Command Port at 55355.
+![Screenshot of Network Commands setting](/static/assets/tutorial/retroarch-network-commands-en.png)
+4. Go to Main Menu --> Online Updater --> Core Downloader. Scroll down and select "Nintendo - SNES / SFC (bsnes-mercury
+   Performance)".
+
+When loading a ROM, be sure to select a **bsnes-mercury** core. These are the only cores that allow external tools to
+read ROM data.
+
 #### With hardware
 
 This guide assumes you have downloaded the correct firmware for your device. If you have not done so already, please do

WebHostLib/static/assets/tutorial/Super Metroid/multiworld_en.md

@@ -12,6 +12,7 @@
         - snes9x Multitroid
           from: [snes9x Multitroid Download](https://drive.google.com/drive/folders/1_ej-pwWtCAHYXIrvs5Hro16A1s9Hi3Jz),
         - BizHawk from: [BizHawk Website](http://tasvideos.org/BizHawk.html)
+        - RetroArch 1.10.1 or newer from: [RetroArch Website](https://retroarch.com?page=platforms). Or,
     - An SD2SNES, FXPak Pro ([FXPak Pro Store Page](https://krikzz.com/store/home/54-fxpak-pro.html)), or other
       compatible hardware
 - Your legally obtained Super Metroid ROM file, probably named `Super Metroid (Japan, USA).sfc`
@@ -107,6 +108,21 @@ first time launching, you may be prompted to allow it to communicate through the
     - SNIClient users should look in their Archipelago folder for `/SNI/lua/x64` or `/SNI/lua/x86` depending on if the
       emulator is 64-bit or 32-bit. Please note the most recent versions of BizHawk are 64-bit only.
 
+##### RetroArch 1.10.1 or newer
+
+You only have to do these steps once. Note, RetroArch 1.9.x will not work as it is older than 1.10.1.
+
+1. Enter the RetroArch main menu screen.
+2. Go to Settings --> User Interface. Set "Show Advanced Settings" to ON.
+3. Go to Settings --> Network. Set "Network Commands" to ON. (It is found below Request Device 16.) Leave the default
+   Network Command Port at 55355.
+![Screenshot of Network Commands setting](/static/assets/tutorial/retroarch-network-commands-en.png)
+4. Go to Main Menu --> Online Updater --> Core Downloader. Scroll down and select "Nintendo - SNES / SFC (bsnes-mercury
+   Performance)".
+
+When loading a ROM, be sure to select a **bsnes-mercury** core. These are the only cores that allow external tools to
+read ROM data.
+
 #### With hardware
 
 This guide assumes you have downloaded the correct firmware for your device. If you have not done so already, please do