* Make /api/v1/timelines/public and /api/v1/timelines/tag/:id public
Fix#1156 - respect query params when generating pagination links in API
* Apply pagination fix to more APIs
to only those from local users; Add link to "extended information" to
getting started in the UI; Add defaults for posting privacy; Change
how publish button looks depending on posting privacy chosen
resources that require a user context vs those that don't (such as public timeline)
/api/v1/statuses/public -> /api/v1/timelines/public
/api/v1/statuses/home -> /api/v1/timelines/home
/api/v1/statuses/mentions -> /api/v1/timelines/mentions
/api/v1/statuses/tag/:tag -> /api/v1/timelines/tag/:tag