Merge pull request #13 from xduo/staging

Add services
Merge pull request #14 from xduo/staging

Delete unused files
Merge pull request #2 from wooice/master

Update code
update tag service
Merge pull request #15 from xduo/staging

Add repost web service
Refactor tag service

Pass basic smoke test
Merge pull request #16 from dugu108/staging

Refactor tag service
add follow/unfollow web service