Add an extractor for roxwell.com (closes #1044)

youtube_dl/extractor/__init__.py

@@ -52,6 +52,7 @@ from .pornotube import PornotubeIE
 from .rbmaradio import RBMARadioIE
 from .redtube import RedTubeIE
 from .ringtv import RingTVIE
+from .roxwel import RoxwelIE
 from .sina import SinaIE
 from .soundcloud import SoundcloudIE, SoundcloudSetIE
 from .spiegel import SpiegelIE