Merge pull request #113 from RenchuSong/master

dotdotdot bugfix
fix bug:
Merge pull request #115 from junshiguo/master

fix bug: user and add friends in his own page
Administrators can edit group information
Merge branch 'master' of https://github.com/Raysmond/FDUGroup
Send/reply message interface
Update message/detail view
Fix waterfall load problem #114
Update comments
active posts order
JOIN RatingStatistic in "post/find"
use one-time SQL in "active_groups" module and Friend/getFriends()
fix GroupController/delete
fix UserController/admin
fix UserController/edit
fix bugs in "change user password"
Ajax actions in MessageController/view
Default site URL
Default type parameter(published) for AdsController/view
Update navigation