Added checkbox property to Camera to open the forward-facing camera.
added default value to new front-facing property of Camera
added default value to new front-facing property of Camera
Merge branch 'camera_front_facing_option' of github.com:marksherman/appinventor-sources into camera_front_facing_option
Added checkbox property to Camera to open the forward-facing camera.
added default value to new front-facing property of Camera
Adding option to request front-facing camera.
Added default value to new property.
Updated documentation to match.

Change-Id: I445d9fc696005973ff1ac87ca99e2c90658d56f5
Merge branch 'camera_front' of github.com:marksherman/appinventor-sources into camera_front

Conflicts:
	appinventor/components/src/com/google/appinventor/components/runtime/Camera.java

Change-Id: I706b675ee3f195dc91afe175820244da45f3276e
Merge branch 'master' of gerrit.appinventor.mit.edu:app-inventor-private
Merge branch 'master' of https://github.com/mit-cml/appinventor-sources