Merge pull request #25 from htgoebel/master

Add contributions page and project description to documentation main page.
Add debops.hwraid documentation
Merge pull request #26 from drybjed/hwraid

Add debops.hwraid documentation
Update debops.debops documentation
Merge pull request #28 from drybjed/update-debops.debops

Update debops.debops documentation
Fix installation guide: correct usage of make + PREFIX.