Outdated install docs and broken link

[Anne Gentle]

Reported via email from Jay Payne.

These can be fixed in the cinder repo at doc/source/devref/development.environment.rst and doc/source/_theme/layout.html
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I was working through some dev documentation and came across this page. http://docs.openstack.org/developer/cinder/devref/development.environment.html

It states:

This section is tested for Cinder on Ubuntu (10.10-64)
Install the prerequisite packages.
On Ubuntu:

sudo apt-get install python-dev libssl-dev python-pip git-core

I've tested it with Ubuntu(12.04 LTS) and the prerequisite packages should be

sudo apt-get install python-virtualenv libxml2-dev libxslt-dev libmysqlclient-dev libpq-dev

Everything else seems to work the same way.

Also, The link in the right column at the bottom seems to be broken "Cinder 2011.2 docs

Psst... hey. You're reading the latest content, but it might be out of sync with code. You can read Cinder 2011.2 docs or all OpenStack docs too.

[John Griffith (john-griffith)]

Fixed here:
    https://review.openstack.org/#/c/28319/

and here:
    https://review.openstack.org/#/c/30030/