OStatusPlugin:
- Stop adding the remote-follow button
- Subscribe to required RemoteFollow plugin events
- Drop main/ostatussub route and update urls to the main/RemoteFollowSub route
- Bump plugin minor version number
actions/ostatusgroup,
actions/ostatuspeopletag:
- Update urls to the main/RemoteFollowSub route
lib/util:
- Port required functions from OStatusSubAction and adapt to be used with the new events
