Native camera with preview.
Added basic metadata.
Merge branch 'master' of github.com:zhenSearcher/native-camera

Conflicts:
	app/src/main/java/com/left/to/zlu/nativecamera/CameraPreview.java
	app/src/main/java/com/left/to/zlu/nativecamera/NativeCameraFragment.java
	app/src/main/res/layout/fragment_native_camera.xml