[CeskaTelevize] Add initial support for ceskatelevize.cz
skip test
[CeskaTelevize] fix python3 support @dstftw
[CeskaTelevize] raise ExtractorError if you are outside of CR
Merge branch '_ceskatelevize' of https://github.com/pulpe/youtube-dl into pulpe-_ceskatelevize
[ceskatelevize] Fix video availability check and add geo unrestricted test