updated gradle files, added NPE Todo
added preferences and method to choose what camera to init
added preferences and method to choose what camera to init
added hint to README
fixed passing params to CameraActivity.java. Added try/catch to clearFocus method in CameraPreview.java
fixed FFC rotation issue
not using focus/autofocus if camera don't support it
not using focus/autofocus if camera doesn't support it
not using focus/autofocus if camera doesn't support it
Merge pull request #2 from shliama/master

Added support to choose between front/back cameras.