Add internetConnectivityRequired flag for application description

Applications which require a active internet connection before they can be loaded can now
indicate this through adding the boolean flag internetConnectivityRequired to their
appinfo.json. The webapp launcher will check on startup if a active internet connection is
available and if not refuce to load the app.

Signed-off-by: Simon Busch <morphis@gravedo.de>
Load application plugins from plugins directory

Signed-off-by: Simon Busch <morphis@gravedo.de>
Merge pull request #12 from webOS-ports/morphis/work

Morphis/work