Fix #24: add --format option to gem_dep_checker, accept xml/json (rev 2)
Forward dep version checker args onto gem version analyzer (rev 1)
Fix #62: permit multiple koji tags to be specified to lookup
Follow on formatting / style fix
Fix #63: Implement Koji#tagged_in to list tags pkg is in
Add specs for last few commits
Merge pull request #64 from ManageIQ/koji_enhancements

Koji enhancements
Merge pull request #60 from ManageIQ/forward_version_checker_args

Forward dep version checker args onto gem version analyzer
Merge pull request #56 from ManageIQ/dep_checker_formatting

Fix #24: add --format option to gem_dep_checker, accept xml/json
Add pkg_prefix conf_attr to Koji module (rev 3)

Rebased against current master