stream.flv_playlist: Fix deadlock on close.
travis: Attempt to fix weird issue with "git describe".
travis: Should be fine now...
plugin.api.http_session: Make sure session proxies are prioritized.

Normally requests will fetch proxies from the environment
when a HTTP request is made, causing the session proxies
to be overridden. This fix explicitly tells requests to use
the session proxies when a HTTP request is made.

Resolves #336.
added chaturbate plugin
Merge pull request #337 from papplampe/develop

Add a plugin for Chaturbate
plugins.ustreamtv: Fix missing transcode streams.

If a transcode is the same resolution as the source stream
it does not get added to the list of streams.
cli: Add a --http-ignore-env option.