Add RTLnow extractor

Supports http://rtl2now.rtl2.de and http://rtl-now.rtl.de
Add RTLnow extractor
Merge remote-tracking branch 'rzhxeo/rtlnow'
Add VOXnow to RTLnow extractor
Merge pull request #1273 from rzhxeo/rtlnow

Add support for http://voxnow.de
[youtube] Support watch_popup URLs (Fixes #1275)
[collegehumor] Allow old-style videos (Fixes #1285)
Cache suitable regular expressions

This speeds up TestAllURLsMatching.test_no_duplicates by about 8000% at the cost of minimal memory overhead.
[generic] Ignore stupid HTTP servers (#1284)
[generic] support HTML5 video
release 2013.08.21
[rtlnow] Add support for error message for queries from outside of Germany
Allow hours in ETA display (Fixes #1280)
[vimeo] extract information for Vimeo Pro videos from http://player.vimeo.com/video/{video_id} (fixes #1197)

For some videos https://vimeo.com/{video_id} doesn't work
[soundcloud] Support widget urls (fixes #1252)
[vevo] Fix urls with a query (#1258)
[funnyordie] fix extraction of video url and title
[statigram] change test video

The old one cannot be accessed.
[youtube] update uploader name for a test video: 'IconaPop' has changed to 'Icona Pop'
Add an extractor for tv.slashdot.org (closes #1192)

It uses the ooyala platform, so it just extracts the ooyala url.