Fixing the feedlist and more.

- Fixed the 'read' and 'unread' counters of the posts.
- When changing from one feed to another, the 'selected-feed' class was kept when a post was readed.
- Fixed a problem when moving a feed after creating a folder.
- Fixed some otros problems caused by the new folder system.
- Fixed a possible 'session alredy started'.
- Recovered update_feed_name function from connections model that was lost in the last commit.
- Updated base (MVCious).