Allow multiple volumes-from
Fix #1654 Improve the introduction to repositories flow.
Merge pull request #1913 from metalivedev/1654-registryexamples

Fix #1654 Improve the introduction to repositories flow.
Docs: remove reference to deprecated 'base' image
Remove many remaining docs references to the deprecated `base` repository and several other minor doc cleanups
Simplify install instructions now that our overlay is in the official repositories.xml list, and add note about hacky #1422 workaround
Merge pull request #1914 from tianon/base-repository-is-deprecated

Removing the deprecated `base` repository from more docs
Merge pull request #1886 from dotcloud/multi-volumes-from

* Runtime: Allow multiple volumes-from
Download Ubuntu 13.04 repository key over HTTPS
Merge pull request #1929 from tianon/gentoo-docs

Simplified Gentoo install instructions now that our overlay is in the official layman repositories.xml list
Merge pull request #1932 from jcassee/patch-1

Download Ubuntu 13.04 repository key over HTTPS