Added front/back camera option
Removed all whitespace-only lines from the source code to stop myself from going crazy...
Added an option for camera flash to be on/off/auto during QR code scanning
Documented Android flash:"on" quirk after finding out that setting focus mode to CONTINUOUS_PICTURE or CONTINUOUS_VIDEO actually gave poorer results (flash only turned on during the first autofocus attempt, if at all - may be device dependent)