audio: Correct some spelling.
audio: Remove unnecessary conversion to io.Reader.
Add Encoder interface.
AUTHORS: Fix file name in comment.
Merge pull request #2 from mewpull/master

Correct some spelling and remove unneccessary conversion to io.Reader
LICENSE: Fix formatting, link to online version.
AUTHORS: remove file (use online version instead).
Minor spelling and grammar fixes, fix a few pieces of inaccurate documentation
Merge pull request #4 from mdlayher/master

Minor spelling and grammar fixes, fix a few pieces of inaccurate documentation.