Implement alert system

Get working log out and sessions

Check for bad log in and bad account creation
Resolve index controller merge conflicts
Merge pull request #14 from banana-slugs-2014/tim_logout

Implement alert system
Merge pull request #17 from banana-slugs-2014/Darren_posts

changes so username login instead of email login
cooool
Migrate routes from index into posts
fix no user login error
comments work now on posts route, and such