Merge pull request #2 from judychen/master

修改了首页和论坛布局
Merge以后又做了一些小的改动
增加了消息系统改进了一些细节
增加上传AI的功能，改进了一些细节
Update Gemfile
CompleteCommit
FixedCSSLoopDependency
Delete Screenshot from 2013-09-07 00:38:33.png
Delete football.jpeg
Delete 3884577392_d33b3ecde8_o.jpg
Delete ph21.jpg
Merged
Merged
Merged
FixedSomeBugs
FixedSomeBugs
Ignore some Vim files
Delete 20130903034930_create_messages.rb
Delete embed

WTF!!!没有扩展名就不能预编译CSS嘛？！
Update application.css