Support rspec-puppet v1.0.0

include_class has been replaced with contain_class.
http://bombasticmonkey.com/2013/12/05/rspec-puppet-1.0.0/
Allow --dport --sport without preceding -m

Test rule added to spec
Merge pull request #276 from ghoneycutt/rspec_puppet_v1

Support rspec-puppet v1.0.0
Merge pull request #280 from jeffb-bt/master

Allow --dport --sport without preceding -m