Doc site updated for 0.5 features

Hi everyone,

http://ansible.github.com/ now contains numerous additions from the 0.5 release.

This includes, but is not limited to:

* references to --connection=ssh
* documentation on the assemble & authorized keys modules
* the home= parameter to the user module (added in 0.4, actually)
* mentioning of -u and --sudo-user in the getting started section
* mention of ansible_python_interpreter as a magic variable
* mentioning of being able to exclude groups with "yesgroup:!nogroup"
* mentioning that you can store modules relative to playbooks in the "./library" directory

Here's the changes:

https://github.com/ansible/ansible.github.com/commit/6eb53ad54095d983b7f70b5a4923a899a8238c15

If you see something missing or want to fix something up a bit, you can send pull requests to https://github.com/ansible/ansible.github.com

Just edit the "rst/" directory files (which are all in ReStructured Text Format), and I will take care of the Sphinx build on my end.

Thanks!

--Michael

Thanks for keeping the docs current, Michael!