General improves and upgrades

Updated to Puppet Labs CentOS 6.5 for VirtualBox. Improved README.
Switched from r10k to librarian-puppet. Improved bootstrap. Basic Apache
install by default. Adding tags to AWS instances. Better private IP
address. Don't error out if AWS module is not installed. Pointing to
newer HUIT AWS Amazon Linux 2013.09 box.
172.16.0.0 is actully a /12!
Vagrant 1.4 is required, updating documentation.
Add ability to not run Librarian, useful for vagrant provision
Merge branch 'master' into splunk

Conflicts:
	Puppetfile
	Vagrantfile
	manifests/init.pp