Merge pull request #40 from wangxiao/master

待上线：应用模块
Merge pull request #41 from wangxiao/master

待上线
Support heartbeat, without testing...
Fixed a potential perf problem when destroy bootstrap tooltip widget
Refactor Photos to support cache data
Fix a problem that cause 'signout' to fire twice
Repair .gitignore
Add a common service can mix event emitter behavior to any object
Remove href for signout anchor to prevent a unexpected signout event
Refactor Messages to work with cache
Try to migrate to socket.io
Refactor Photos to support background work with message pusher
Transit to socket.io
Merge pull request #42 from windyarts/master

Socket.io support
Merge branch 'master' of https://github.com/wandoulabs/satan
提取contacts文案、完善search接口