Adds checkbox property to Camera to open the front-facing camera.

Adding option to request front-facing camera.
Added default value to new property.
Updated documentation to match.

Change-Id: I18780f1bedd27266b02d40f90a3079f42e6792ec
Add a “Hard Reset” Connection Menu Item

This menu selection tells the aiStarter to run the “reset-emulator”
script. This script removes the user specific
Appinventor-emulator-data file, which will effectively reset the setup
package installation to a “factory” fresh state.

Change-Id: Icfbf0a35f2aa5d1102db27c290533e5490e38fef