Merge pull request #105 from RenchuSong/master

Group Intro Cropping and Post Cropping
Merge pull request #107 from RenchuSong/master

Some little changes
Update RRouter
login redirect
Merge branch 'master' of https://github.com/Raysmond/FDUGroup
login redirection
add jquery source file map
fix user picture view in comments
fix MessageController/detail
fix Group/getGroupsOfCategory(), load groups of parent category itself
find posts order
Update MessageController.php
Support arbitrary JOIN conditions.

+ This should also improve _substitute() performance.
+ Forced a syntax change for $relation definitions.
Add a simple update() sink. Close #110.
Update PostController/delete,edit
fix today's hot posts module
Update Wallet, User/getWallet()
Initialize RatingLike model
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