-Renamed GlobalConfig to ProjectSettings, makes more sense.

-Added system for feature overrides, it's pretty cool :)

servers/visual/visual_server_viewport.cpp

@@ -28,7 +28,7 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
 /*************************************************************************/
 #include "visual_server_viewport.h"
-#include "global_config.h"
+#include "project_settings.h"
 #include "visual_server_canvas.h"
 #include "visual_server_global.h"
 #include "visual_server_scene.h"