[chirbit] Add new extractor.

youtube_dl/extractor/__init__.py

@@ -63,6 +63,7 @@ from .ccc import CCCIE
 from .ceskatelevize import CeskaTelevizeIE
 from .channel9 import Channel9IE
 from .chilloutzone import ChilloutzoneIE
+from .chirbit import ChirbitIE
 from .cinchcast import CinchcastIE
 from .clipfish import ClipfishIE
 from .cliphunter import CliphunterIE