[vgtv] Add new extractor

Because of the #! in the URL structure for VGTV we need to add ' before and after given URL. Or else it will cry:

-bash: !/video/100495/lars-og-lars-sesong-6-episode-6-lakselus: event not found

youtube_dl/extractor/__init__.py

@@ -325,6 +325,7 @@ from .veehd import VeeHDIE
 from .veoh import VeohIE
 from .vesti import VestiIE
 from .vevo import VevoIE
+from .vgtv import VGTVIE
 from .vh1 import VH1IE
 from .viddler import ViddlerIE
 from .videobam import VideoBamIE