fixes #237 - installing puppet from epel breaks if base image is not 5.3 or 4.9 release

fixes #235 - Small refactoring of the media handling for operating system families: * Use URI class for any URI related operations * Added substitution for $version, $major and $minor in media path * Force use of http(s)|ftp|nfs URI schema: NFS shares have now to be entered in URI form: nfs://server/path/.../ instead of server:/path/.../

fixes #226 - Return OutofSync, Error Host list from Dashboard controller as YAML

• added better module detection to properly show the module list
• Add sorting to module class lists
• Add description to each link

fixes #231 - find_each LocalJumpError (no block given)

added titles to hosts show page actions

fixes #160 - Last Report Date is client date, not date report was received

fixes #225 - migration fails - undefined local variable or method release_name

fixes #224 - edit multiple fails on operating system

fixes #222 - add search and sort functionality to dashboard host lists