Fixes issues with following blogs

Use BOOLs not NSNumbers when assigning values
Adds calls to the /read/follows/mine/ endpoints for feedbag sites.
Merge branch 'develop' of github.com:wordpress-mobile/WordPress-iOS into issues/1682-follow-for-dotorg
Merge pull request #1741 from wordpress-mobile/issues/1682-follow-for-dotorg

Issues/1682 follow for dotorg