+  reflect buffered_envelope method +  fix view_transform to return ctrans (TODO)
+  reflect buffered_envelope method
+  fix view_transform to return ctrans (TODO)



git-svn-id: 06a2cde72a096d93ff72b88e3e6711b8f00772a4@856 d397654b-2ff0-0310-9e29-ba003691a0f9

semprebon/mapnik,semprebon/mapnik,semprebon/mapnik,semprebon/mapnik,semprebon/mapnik