Added junit tests, cleaned up code, put in javadocs

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

	modified:   res/layout/activity_camera_settings.xml
	modified:   res/values/strings.xml
	modified:   src/com/catalyst/android/birdapp/CameraActivity.java
	modified:   src/com/catalyst/android/birdapp/camera/CameraPreview.java
	modified:   src/com/catalyst/android/birdapp/utilities/CameraUtilities.java
	new file:   test/com/catalyst/android/birdapp/utilities/CameraUtilityTest.java