Rename README to indicate its use of reStructuredText.
Updated the README to use reStructuredText.

Using http://docutils.sourceforge.net/docs/user/rst/quickstart.html
as a guide.
Merge pull request #11 from Freso/convert-readme-to-rst

Reformat README to use reStructuredText.

https://github.com/Freso/MusicBottle/pull/11