Added redirect from old location of documentation (/documentation), these was the location when we were on github.
Updated documentation and fixed Vagrantfile
Updated ubuntu install
Updated Vagrantfile and documentation to reflect new installation path using Ubuntu's PPA, also switched everything to use Ubuntu 12.04 by default.
Updated gettingstarted with quicker install.
Merged changes
Merge remote-tracking branch 'dotcloud/master' into dhrp/docs

Conflicts:
	docker/docker.go
	docs/sources/installation/archlinux.rst
	docs/sources/installation/index.rst
	docs/sources/installation/ubuntulinux.rst
	runtime.go
	utils.go
Fixed remaining issues and conflicts created by last merge.
Merge pull request #427 from dhrp/docs

- Packaging: Fixed Vagrantfile
* Documentation: Updated install instructions