(maint) Add fedora 20 to build defaults
Merge pull request #572 from melissaanne/maint/stable/add-f20-to-mock-list

(maint) Add fedora 20 to build defaults
(packaging) Update FACTERVERSION to 1.7.4-rc1
Merge tag '1.7.4-rc1'

1.7.4-rc1

* tag '1.7.4-rc1':
  (packaging) Update FACTERVERSION to 1.7.4-rc1
  (maint) Add fedora 20 to build defaults