Make libgladeui-2 library come with introspection data, patch based on original
	patch by Alan Knowles.

	* configure.ac: Added gobject-introspection m4 stuff

	* gladeui/Makefile.am: Added rules to build Gladeui-2.0 gir and typelib

	* gladeui/glade-app.c, gladeui/glade-command.c, gladeui/glade-project.c: Some changes
	  made to pass the introspection build.