Mocap 1.4-alpha-2

[1.4-alpha-1 -> 1.4-alpha-2]
-Fixed issues with command argument parsing and suggestions.
-Fixed issue with player head rotation.
-Fixed non-player entities not moving.
-Fixed issue with group ("@") entity filter not working properly.
-"play_entities" setting is now set to "*" by default.
-"Experimental version" warning now uses translation keys.