added missing pngs to repository

git-svn-id: http://notifications-widget.googlecode.com/svn/trunk@289 21922344-3934-ee51-d6e3-fd981ce84c01
git-svn-id: http://notifications-widget.googlecode.com/svn/trunk@290 21922344-3934-ee51-d6e3-fd981ce84c01
Added Android Studio project files

git-svn-id: http://notifications-widget.googlecode.com/svn/trunk@291 21922344-3934-ee51-d6e3-fd981ce84c01
merged from notificationswidget r291

git-svn-id: http://notifications-widget.googlecode.com/svn/trunk@292 21922344-3934-ee51-d6e3-fd981ce84c01