stream.hls: Handle parser errors.
Update flashmedia.
stream.hds: Use global height as stream name if needed.
utils: Unify urlget and urlopen.
stream.http: Handle request sessions in __json__.
stream.hls: Remember cookies set by variant playlist response.

Resolves #258.
plugins.ustreamtv: Add __repr__ to UHSStream.

Resolves #251.
plugins.twitch: Also support the t parameter on VOD highlights.
cli: Don't pass our proxy settings to the player.

Resolves #260.
Merge remote-tracking branch 'upstream/develop' into develop