* [x] regonfigured the build matrix with more php jobs and a separate python job (we can add more python jobs later)
* [x] run tests on travis' trusty beta container (it's closer to what we need anyway)
* [x] install packages needed for analyzer tests in build env
* [x] added docs on how to run nosetests locally
* [x] don't run initctl in analyzer setup so setup can also be used on travis (and add it to the install script directly)
* [x] ignore replaygain checks on travis (it has proven quite impossible to get the needed python-gi module to work in the provided virtualenv)
I tried a lot of solutions to get the replaygain checks to run. I needed to decide that this has gone far enough, maybe someone who is more of a pythonista than me can take a crack at it and get it solved. Even without running those tests on CI/CD there are still plenty others.
This PR only has parts of what are needed for getting python tests running on travis as per #15. I only took a quick shot at anything not analyzer and figured I would not be able to "fix" them without digging a bit deeper (ie. also getting rid of std_err_override).
* Ripped out all the ReplayGain and Silan analysis from pypo, since
it's now implemented in airtime_analyzer. This fixes a bunch of
race conditions.
* Also renamed the replaygain field to replay_gain in airtime_analyzer
to match Airtime.
* Implemented Replaygain analysis for Ogg Vorbis, MP3, MP4, and FLAC
using python-rgain
* Added unit tests for ReplayGainAnalyzer
* Squashed stderr output in ReplayGainAnalyzer and CuePointAnalyzer
* Clean up
Kyle Robbertze
Lucas Bickel
Albert Santoni