Merge pull request #2 from kshur/master

Scale target rectangle to match frame
[tracker] modified to workflow of camtrack
[tracker] fixed tracker application.

1. fixed target position in CameraPreview
2. fixed image channel calculation error in native code
[tracker] refactor of libraries
[tracker] added IplImage capture for debug
[tracker] added function for jpeg codec
[tracker] fixed bug (tracker work now)
Add server/client notification interface