Description
Implement API methods for follow and unfollow of conversations and tags. Should be implemented in REST style, so methods should look like:
GET api2/conversations/CONVERSATIONID/followers
POST api2/conversations/CONVERSATIONID/followers (with user ID that will follow)
DELETE api2/conversations/CONVERSATIONID/followers/USERID
GET api2/tags/TAGNAME/followers
POST api2/tags/TAGNAME/followers (with user ID that will follow)
DELETE api2/tags/TAGNAME/followers/USERID