Fixup readme for packer
Since the 12.04 release, Ubuntu uses the more standard "sudo" group
add empty builds directory with a subdirectory for each build type
vagrant boxes now match current naming conventions and are built into the builds directory
modified .gitignore
pointing CentOS 5.9 to the correct HTTP directory
Clean FreeBSD boxes to save space. Use Bourne shell for that script, since
FreeBSD doesn't have bash by default, and the script will work on all Linuxes
anyway.
Merge pull request #89 from juliandunn/compress-freebsd-box

Clean FreeBSD boxes to save space.
Merge branch 'master' into fix-box-names
compressing vboxmanage for freebsd
Merge pull request #90 from tduffield/fix-box-names

Fix box names
Merge pull request #84 from whiteley/BENTO-91

Since the 12.04 release, Ubuntu uses the more standard "sudo" group
missed -amd64 on ubuntu 12.10 template
Merge branch 'fix-box-names'
fixing packer templates to work on vmware
Merge pull request #93 from someara/vmware

fixing packer templates to work on vmware
Merge pull request #83 from juliandunn/fix-readme-for-packer

Fixup readme for packer