Engine : adjusted warning settings in 'makefile'
Engine / TMX loader : parse tilewidth/height from <map> element, as these
will be needed for converting object coords (in pixels) to real coords.
Engine / TMX loader : began work to parse <object> elements.
Engine / TMX loader : allocate a buffer for entity string, and implemented a
TMX_EntityPrintf() function for stuffing it.  Generate a worldspawn entity.
Engine / TMX loader : convert object with gid #42 to a player start entity,
and object with gid #41 to a light entity.  Handle object properties, mostly
passing the name/value unchanged, but handle "radius" specially to scale it
by TMX_TILE_SIZE.
Engine / TMX loader : removed the 'test_entity_crud' string.
Engine / TMX loader : fixed TMX_ProcessObjectProperty(), and some other fixes.
Data : in test map, added style property to a light.