Update path to install script.

https://raw.github.com now redirects to https://raw.githubusercontent.com

Update path to reflect this.
Update readme to point at 0.10.0
Always provision on boot
Don't provision twice when starting VM for the first time
Only provision VM when booting
Make apt-get update quiet
Update README.md
Update to Docker 0.11.0
Update to Docker 0.11.1
allow client url to be computed if version is overridden in defaults
add notice on readme