Vendor OpenAL, libsndfile

[capnkenny]

Self-titled. Can disregard branch name, originally was going to use libnyquist but floating point sound files weren't playing nice with OpenAL at all.

• Vendors Ogg, Vorbis, FLAC, and Opus
• Vendors libsndfile
• Vendors OpenAL
• Fixes a few bugs found with Input, Audio
• Adds background colour changing via DefaultRenderingSystem
• Also replaced a few resources

Seeing as I ran into a few heap corruption errors (that were fixed before I opened the PR), I wouldn't mind volunteers to try this branch out with AudioEcsSample :D

[FiniteReality]

I'm not a huge fan of us implementing the code needed to read/write these files ourselves. It opens us up to a bunch of security concerns that we need to handle correctly, and we can't use an upstream source to assist with that.

[capnkenny]

@FiniteReality Based on our discussion, the most recent commits revert back to libsndfile for file handling