Version 1.1 to production
Modify README.m
Add PreferenceList to select video resolution

Add PreferenceList in PreferenceActivity to manage Video recording resolution.
There are three options: 1080, 720 and 480 px. VideoModel tries to use the value
stored in App.videoResolution to set de CamcorderProfile. If it can't, it tries
with method VideoModel.searchAvailableProfile().