Added Camera resolution selector to MobileBarcodeScanningOptions
Now there is a property on the MobileBarcodeScanningOptions that allows you to set your own delegate which will then be queried to return its preferred CameraResolution from a list of available CameraResolution objects.  It's safe to return null as well and use the default resolution.
Added Android sample showing how to use the fragment to scan
[Android] Added performance counters/more logging
[iOS] Fixed resolution selector
[Android] Now takes UseFrontCameraIfAvailable into account, fixes #120
Merge pull request #121 from Redth/android-resolution

Android resolution