Merge pull request #17 from xduo/staging

Add follow/unfollow web service
Merge pull request #18 from xduo/staging

Add comment service
Merge pull request #19 from xduo/staging

Add null check annotation
Merge pull request #20 from xduo/staging

Add get sounds web services
Merge pull request #21 from xduo/staging

Add group apis
Merge pull request #22 from xduo/staging

Group api bug fix
Merge pull request #23 from xduo/staging

Add logging
Merge pull request #24 from xduo/staging

Add repost api
Merge pull request #3 from wooice/master

Update code
Merge pull request #25 from xduo/staging

refactor and bug fix
Merge pull request #4 from wooice/master

Update
add recommand interfaces
Merge pull request #26 from xduo/staging

Bug fix
implement basic recommandation
Merge pull request #27 from dugu108/staging

Merge social interfaces
add ws for recommand
update social interfaces
Merge pull request #28 from dugu108/staging

Update social interfaces
add page param for social interfaces
fix