More petty formatting changes and stuff

Optimize converter example

Fix a couple of compiler warnings

Refactor rendering code for ~40% speed improvement

Fix EDx note delay bug

Add README

Remove superfluous call to memset()

Add another song, and rename a few others

Update and annotate the sine wave oscillator table

Simplify player example a tiny bit

Add some more test songs

Strip the directory part when printing filenames

Reorganize things a bit

Refactor resampling code

Replace period table with a smaller finetune table