Support for RHEL7 and automated kickstart testing

Also fixing all the bugs we had in kickstarts from RHEL4, 5, 6, and 7 and
all Fedoras.
Merge pull request #38 from lzap/rhel7-support

Support for RHEL7 and automated kickstart testing
Adding Rakefile and Travis
Merge pull request #40 from lzap/travis-initial

Adding Rakefile and Travis