Merge branch 'hotfix/docs'
cli: Verify that numbers are not zero or negative.
stream.rtmp: Fix is_usuable().
plugin.api.http_session: Add timeout attribute.
Add generic HTTP timeout option, --http-timeout.

This means the previous --http-timeout is moved
to --http-stream-timeout.
plugin.api.http_session: Add a resolve_url method.
plugins.filmon_us: Update to use http.resolve_url().
utils: Deprecate many functions that have been replaced or are not needed.

The following functions are no longer needed:

- swfverify - Use swfVfy in the RTMPStream's params instead

The following functions have been replaced:

- res_json   = plugin.api.http.json
- res_xml    = plugin.api.http.xml
- urlget     = plugin.api.http.get
- urlopen    = plugin.api.http.get
- urlresolve = plugin.api.http.resolve_url
Update AUTHORS.
Update CHANGELOG.rst.
Add py34 to tox.ini.
Release version 1.8.0.
Merge branch 'release/1.8.0'
Merge branch 'release/1.8.0' into develop
Added furstream and ZDFmediathek plugins
Merge pull request #360 from skulblakka/develop

Add support for furstream and ZDFmediathek
plugins.svtplay: Add support for SVT Flow.
stream.hls: Cut off any garbage data when decrypting.
stream.hls: Better log message for previous commit.
plugins.hitbox: Update for API changes.

Resolves #366.