Added comments, cleaned up code.

Signed-off-by: Hannah <hyoung20@gmail.com>

	modified:   AndroidManifest.xml
	modified:   res/layout/activity_camera_layout.xml
	modified:   res/layout/camera_controls.xml
	modified:   res/values/strings.xml
	modified:   src/com/catalyst/android/birdapp/CameraActivity.java
	modified:   src/com/catalyst/android/birdapp/camera/CameraPreview.java