updated manifest file to limit support only to tablet for the current version.
reverted to updated submodules version.
updated usb submodule to the correct commit.
added a boolean return value to InfoMenu#onOptionsItemSelected() method.
avoid call to super.onOptionsItemSelected() if InfoMenu#onOptionsItemSelected() returns true.
that should fix issue #577
Merge pull request #597 from ne0fhyk/feature_restrict_to_tablet

Limit application support to tablet
Merge pull request #600 from ne0fhyk/fix_issue_577

Fix issue #577
Merge branch 'master' of https://github.com/DroidPlanner/droidplanner into feature_phone_ui