Tutorial completed.

git-svn-id: http://notifications-widget.googlecode.com/svn/trunk@318 21922344-3934-ee51-d6e3-fd981ce84c01
extract some strings into strings.xml

git-svn-id: http://notifications-widget.googlecode.com/svn/trunk@319 21922344-3934-ee51-d6e3-fd981ce84c01
some refactoring

git-svn-id: http://notifications-widget.googlecode.com/svn/trunk@320 21922344-3934-ee51-d6e3-fd981ce84c01