Added an _initialized flag to csutils.CsAppBase python class, and also  made it store its reference to the graphics2d plugin as self.g2d.
Added an _initialized flag to csutils.CsAppBase python class, and also 
made it store its reference to the graphics2d plugin as self.g2d.


git-svn-id: 28d9401aa571d5108e51b194aae6f24ca5964c06@29560 8cc4aa7f-3514-0410-904f-f2cc9021211c

crystalspace/CS,crystalspace/CS,crystalspace/CS,crystalspace/CS,crystalspace/CS,crystalspace/CS,crystalspace/CS,crystalspace/CS