fixed rake task
updated rake task
added category_id method to post model
Merge pull request #9 from sonialin/association-fix

fixed rake task
Remove category_id method from post model
Change thumbnail description text color
Correct followers in user hover
Add slidetoggle to modification request form
Add mailgun for sending mails
Add fund applicant avatar to application listing in post show view
Enable replies after various bet statuses
Remove free from posts
Remove public activity gem and relevant code
Bundle install
Hide bet attachment from other users, add one bet status, tweak layout of funding page per bet status
Add user karmas(contributions) to user hover and profile
Add tip for attachment and sliding effect for application text area
Hide reply attachment and show reply user avatar
Add notifications for bet thread replies
resolved conflicts