bumping default version of splunk from 6.0.3 to 6.1.3
the splunkforwarder url was wrong for omnios (tar.Z should be pkg.Z) and a client test was failing due to omnios not having a 'ruby' package (just added a conditional to use 'ruby-19' if platform_family is 'omnios', 'ruby' otherwise)
Merge pull request #17 from opscode-cookbooks/v613-upgrade

bumping default version of splunk from 6.0.3 to 6.1.3