Add fast Gstreamer support (#32)

* hacky rtp code

* add some calculations

* added new command for rtp streaming

* refactor out func to start with consumer in prep for adding the rtp sender

* added port and host

* finish experimental rtp stream

* finish experimental rtp stream

* tweak the code a bit

* fix merge errors

* add sample wav

* add audio dump

* audio kind of works, just the timestamps are messed up

* add gst pipeline

* thinggs

* WIP-finally it works

* fix up code

* add TODO

* reset README

* add gstreamer to readme

* add libglib to circle ci

* add gstreamer to circle ci

* add gstreamer to circle ci

* add gstreamer to circle ci

* add gstreamer to circle ci

* add gstreamer to circle ci