Removed the no longer existent functions
Added the new audio/video receive callbacks
Added events for audio/video receiving
What was I thinking here....
Forgot about the size
Updated the dll name
Added proper configs for x64 builds (I hope)
Update README.md
Preparing for tomorrow's update
Updated codec settings defaults
Implemented ChangeCallType
Description for ChangeCallType
Register OnMediaChange
Apparently av_OnError got removed...
To prevent lag, don't use the invoker in some cases
Some documentation for toxav enums
Documentation for ToxAvCodecSettings
Adjusted the default jitter buffer size
Removed all of the vpx related stuff

(this stuff wasn't working for the most part anyways)

To access the needed vpx functions, a c-style api will be provided at
some point in the future.
Added tox_get_keys and some helpful classes