Edit and extend README.

- Identify all specified minimum version requirements,
- Add source directory install guidance,
- Add problem reporting guidance,
- Move text from the first person, and
- Minor typographic, grammatical and layout edits.

git-svn-id: svn://daper.net/moc/trunk@2665 910807d9-36e0-0310-a014-e9ea483e2ba4
MOC will soon use snd_pcm_recover() (introduced in ALSA 1.0.11).

git-svn-id: svn://daper.net/moc/trunk@2666 910807d9-36e0-0310-a014-e9ea483e2ba4