Add extractor for teletask
fix test and remove lengthy description
[teletask] Add new extractor
[nerdcubed] Style fixes
[tmz] Fix test's thumbnail field
[rtp] Fix test's id field
[internetvideoarchive] Update test's duration field
[telecinco] Rename 'episode' group to 'id' in the _VALID_URL regex

MiTeleIE now uses '_match_id'
[dbtv] Make sure the 'id' field is a string
[extractor/common] Update docstring: replace FileDownloader with YoutubeDL
[crunchyroll] Add .fr domain (#4537)
Don't write the description file if info_dict['description'] is None (#3166)
[adobetv] Add extractor (Closes #4536)
[cnn] Add support for articles with videos (fixes #4541)
[sportdeutschland] Fix extraction (fixes #4544)
[smotri] Skip broken tests
[gameone] This fix resolves issue #4552

The duration metadata for certain episodes contained floating point
numbers instead of integers. Now only the integer part will be
interpreted. Also added a test for this
Merge pull request #4553 from tobidope/gameone

[gameone] This fix resolves issue #4552
[gameone] Extract duration as float
[sohu] Modernize and extract all formats and more metadata (Closes #4409, closes #2056, closes #3009)