* src/NetworkManager.[ch]
	  src/NetworkManagerDbus.[ch]
	  src/NetworkManagerDevice.[ch]
	  src/NetworkManagerPolicy.c
	  src/NetworkManagerWireless.[ch]
		- Add many more g_return_if_fail()/g_return_val_if_fail() checks
		- Pass the NMData application data structure through all calls
			that need it so we can get rid of nm_get_global_data()
		- Change deallocation of the allowed_ap_list GSList in preparation
			for not completely clearing it every time we get an update,
			but instead getting incremental updates via GConf/dbus


git-svn-id: http://svn-archive.gnome.org/svn/NetworkManager/trunk@20 4912f4e0-d625-0410-9fb7-b9a5a253dbdc