Enforce hostgroup/role uniqueness on User relation
fixes #2398 - fix ruby 1.9 issue when loading free ip, causing {} in URL
Bumped the Rails version to match what's in the nightly tag
Added RHEL6 and F18 comps
Added f18 releases to tito and fixed some typos
Use https when accessing Rubygems.org
fixes #2405 - disable DNS orchestration during TFTP tests, causing timeouts
refs #2254 - STI Host relationships
fixes #2263 search Hostgroup by label
fixes #2247 Provides an option to disable the use of gravatara

A new setting is added, use_gravatar. It defaults to true. If it is set to false, then the gravatar
call out is not used and only the default user icon is used.
fixes #2360 loading parameters on host edit form when hostgroup or environment is changed
fixes #2417 - SSO abstractioning

Apache and Signo SSO reworked to a new general SSO concept.

You can use SSO service that comes with Katello for loggin in. It's
based on OpenID protocol with slightly customized provider.
fixes #2263 continuation - turn off auditing for migration of adding Hostgroup label
Adds an id primary key field to the user_hostgroup relationship

refs commit:28d1dd18
fixes #2419 - disable DNS orchestration during host mailer tests
Feature #2368 - renaming i18n domain to 'foreman.pot'
Feature #2368 - adding German translation file
Feature #2368 - i18n integrating Transifex
Feature #2368 - i18n extracting strings
Feature #2368 - i18n extracting strings