[ellentv] Add new extractor
envvar overrideable PREFIX, BINDIR, MANDIR, PYTHON
Merge remote-tracking branch 'akirk/ellentv'
Allow playlist test definitions in test_download.

This moves playlist tests where they belong, i.e. to the extractors themselves.
Additionally, all our network interaction configuration for tests in test_download now applies to playlist tests as well.
Deprecate test_playlists
[ellentv] Simplify and correct tests
Credit @akirk for ellentv
Merge remote-tracking branch 'origin/master'