viaplay: some of their streams are HDS

this fixes #90
viaplay: move subtitle force thing before download_hds
viaplay: forgot else after that f4m fix.
Improvements to install instructions in README
Add info about reporting issues to README
Break out OppetArkiv to subclass of Svtplay
Merge pull request #91 from olof/topic/refactor_oppetarkiv

Break out OppetArkiv to subclass of Svtplay
picsearch: They have two ways to write mediaId and media-id.

this fixes #94
Fix bug caught by pylint in oppetarkiv fetcher
Adapt Expressen fetch to changes to website

Now Expressen is using HLS.
Fix minor pylint warnings in expressen fetcher
Real fix for oppetarkiv pylint error

Silly me. :(
hls: a way to skip the first playlist with bandwidth info
aftonbladet: they changed how hls works.
hls: move live check to the beginning of the function
Refactor handles URLs tests to mixin
Add initial unittests for expressen
lemonwhale: svd.se have changed provider for videos.
Print newline after Ctrl+C

Fixes #93.
hds: don't output progressbar if --silent