Puppet Module: Fixing search for nil repoids

The problem was that blank? returns true for nil and we want not to enter the
conditional if repoids is nil.
Nutupane: adding read/write system groups to details page.
Merge pull request #2786 from waldenraines/nutupane-system-groups

Nutupane: adding read/write system groups to details page.
Repository: Adding puppet_module_count json
Merge pull request #2796 from daviddavis/temp/20130822102823

Puppet Module: Fixing search for nil repoids
Merge pull request #2798 from daviddavis/temp/20130822112800

Repository: Adding puppet_module_count json
allowing nutupane to call custom actions
Merge pull request #2805 from jlsherrill/nutupane_action

allowing nutupane to call custom actions
Puppet Filtering: Fixed bug where empty filters not getting compacted
Puppet Filtering: Fixed bug where rules not getting saved