added support for Oracle Linux
Merge pull request #311 from aromarom64/feature_oracle_linux

added support for Oracle Linux
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[ci skip]
Add wget to omnibus install.
Merge pull request #320 from bambuchaAdm/master

Add wget to omnibus install.
Support ArchLinux bootstrap
Merge pull request #327 from piglovesyou/pullreq

Support ArchLinux bootstrap
Archlinux integration test. #327

This install does take quite awhile so I may leave it disabled in practice, but checking it in so we can use it for debugging if needed.
Manifest update
Fix compatibility with Ruby 1.8

While it is recommended to use Ruby 1.9 or 2.0 on workstation, we can
still try to be compatible with 1.8.

Thanks to @edwardchuang for finding this!
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