[CeskaTelevize] Add initial support for ceskatelevize.cz

youtube_dl/extractor/__init__.py

@@ -26,6 +26,7 @@ from .c56 import C56IE
 from .canalplus import CanalplusIE
 from .canalc2 import Canalc2IE
 from .cbs import CBSIE
+from .ceskatelevize import CeskaTelevizeIE
 from .channel9 import Channel9IE
 from .chilloutzone import ChilloutzoneIE
 from .cinemassacre import CinemassacreIE