added ubuntu-13.10 packer templates w/debian sudoers scripts
[BENTO-5] Add NFS client capability to CentOS and Fedora templates.

All other packer templates already have this added.
Added templates for RHEL. These re-use the CentOS kickstart scripts, but have the
correct ISO checksums.
Added working definition for Windows 2012R2 Standard Edition
Update links for Windows 2012R2.
Merge pull request #107 from juliandunn/windows-2012r2

Add Windows 2012R2 server definitions.
Merge branch 'master' of github.com:routelastresort/bento into routelastresort-master
Merge branch 'master' of github.com:opscode/bento
Merge pull request #106 from juliandunn/rhel

Added templates for RHEL.