Move installer and updater libraries to cms

CMS Tracker:
http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=29235

Platform discussion;
https://groups.google.com/group/joomla-dev-platform/browse_thread/thread/1d6727a66eca9927.

Platform pull request will be created following successful CMS testing.

Testing of installer is successful.  Testing of updater currently fails.

The code change currently is a simple move of the installer and updater directories from libraries/joomla to libraries/cms.