ceph/ceph — pull request #1419 by kdreyer-inktank (2014-03-10 23:15:15+00:00)
Title: doc: update build prerequisites

Based on an older WIP branch by Gary Lowell ( @glowell2 ).

This is part of the [broader effort to clean up Gary's WIP branches](http://tracker.ceph.com/issues/7675).