TileSource: Wrap champlain_tile_source_set_cache

	* champlain/src/tile-source.hg: Add
	champlain_tile_source_set_cache.
	* tools/m4/convert_libchamplain.m4: Add conversion from
	'const Glib::RefPtr<TileCache>&' to 'ChamplainTileCache*'.
MapSourceFactory: Wrap missing symbols

	* champlain/src/map-source-factory.hg: Wrap missing symbols;
	remove old ignores.
	* tools/m4/convert_libchamplain.m4: Add conversion from
	'const Glib::RefPtr<MapSourceDesc>&' to
	'ChamplainMapSourceDesc*'.
Tile: Wrap "render-complete" signal
Renderer: Wrap champlain_renderer_set_data()

	* champlain/src/champlain_vfuncs.defs: Add set_data() vfunc.
	* champlain/src/renderer.hg: Wrap champlain_renderer_set_data()
	and set_data() vfunc.