Don’t append timestamps on release builds
Ensure results of `Dir.glob` are sorted

This will ensure the `*.dmg` files are preferred for final publishing on
Mac OS X.
Updated Omnibus 3 with preserve permissions fix

This version contains the following backported fix:
https://github.com/opscode/omnibus/pull/336
Updated Omnibus with default package user/group fix
Ensure contents of install dir are owned by root
Update for Chef 10.34.4 release
Simplify the cd-ing to `chef` subdirectory
Merge pull request #247 from opscode/schisamo/release/chef-10.34.0

Packaging fixes for Chef 10.34.x