AAC File Support
What's new in this release:
- ADTS AAC file support - supports ID3v1, ID3v2, and Ape tags
- Updated docs to be a bit more readable
Breaking changes:
- mpeg/AudioFile class is now renamed to MpegAudioFile (index export has not changed)
- mpeg/AudioHeader class is now renamed MpegAudioHeader (index export has not changed)