Merge pull request #77 from luwei0917/master

hh
Merge pull request #78 from luwei0917/master

ll
10:42
Merge pull request #81 from luwei0917/andy

Andy
Merge pull request #82 from luwei0917/master

kk
10:42
Merge pull request #83 from luwei0917/Wei_Lu

Wei lu
10:42
Merge pull request #84 from luwei0917/Wei_Lu

10:42
Merge pull request #85 from luwei0917/master

4/25/2014