Clarifying documentation.
Fixing weird network behavior for older VirtualBox versions.
Merge pull request #19 from amscanne/docs_chef_admin_fix

Clarifying documentation.
Merge pull request #20 from amscanne/fix_old_vbox_dhcp

Fixing weird network behavior for older VirtualBox versions (4.2.4).
Vagrantfile: Add back in repo setup that was removed; leave a note about
some tuning flags that may help.
CentOS kickstart: Specify updates repos; fix up local mirror to be useful.
adding shell guard utilities for ceph quorum and leader states
give VMs 8GB swap and only use 1GB real RAM
add functions for executing commands on failure
use the correct semantics for quorum health check
put VM RAM size back to 2GB for now following discussions with pchandra, jerenkrantz
fixed chef banners all over the place
allow any user to get ceph mon_status via sudo
put graphite behind ssl
drop off a static html file with handy links
make view slightly prettier
have graphite go direct from vip (not thru haproxy)
better mysql load balancing and health checking to avoid db hangs
fixed whitespace
fix small typo in creating mysql check user