must now have a QAction member pointer that is created when the GUI is
initialized in initGui(). This pointer is used in the unload() method to
remove the QAction and associated icon from the plugins toolbar.
* Updated splash for upcoming 0.5 release
git-svn-id: http://svn.osgeo.org/qgis/trunk@1956 c8812cc2-4d05-0410-92ff-de0c093fc19c