Previously the introduction link pointed to www.docker.io. That
did not seem to make a lot of sense to me so instead I pointed it
at:
http://www.docker.io/learn_more/
* added link to edit on GitHub
* Changed image source on homepage
* Made some changes to the structure, added the ability to have l3 navigation. Added warning, note and other styles.
* Fixed an image link, removed the .. :content: links because they were quicky and didn't look good, added pagelinks to current page of other versions.
* Moved the remote client api's to their own doc
* Moved the introduction page to the en/latest/index.html home of the documentation and pointed all links there
* Fixed a broken link from+to homepage
* Fixed the javascript of the documentation navigation to allow expand and collapse multiple times.
* Fixed the one typo Andy pointed out
