from Dennis Gilmore <dennis@ausil.us>:
- setup support so loopback devices can work [RHBZ#1245401]
- from Miroslav Suchý <msuchy@redhat.com>:
- clarify path [RHBZ#1228751]
- document target_arch and legal_host_arches in site-defaults.cfg [RHBZ#1228751]
- document "yum.conf" in site-defaults.cfg [RHBZ#1228751]
- correctly specify requires of yum [RHBZ#1244475]
- bump up releasever in rawhide targets
- remove EOLed gpg keys
- add f23 configs
- removing EOLed f19 and f20 configs