fixes #3960 - wrap APIv2 errors in an "error" node

(cherry picked from commit 0f7d219a4a65cd795eecd05117b08511d9025de2)
fixes #2866 - Changing a hostgroup name doesn't update associated Smart Variable matchers

(cherry picked from commit 709ad8d6f425e0817d3faef2cc629af1458cb1c9)
fixes #4188 - api/v2/status incorrectly shows api_version: 1

(cherry picked from commit 36b32e9352b7a9c23dd012efeb83cbc1bf37abdc)
fixes #4186 - db:seed fails when install media exists with same URL

(cherry picked from commit 202770a1d64f6beae3b1b8ba156d86345c061699)
fixes #4189 - Facts charts are not rendered

(cherry picked from commit ccb763a6fdfbd68330599932fdc705d8922be299)
fixes #4005 - ensure standalone Rabl.render works outside of a controller

(cherry picked from commit 858708c466398ac5f42bb1bb0fd6c1e531e31385)
fixes #4178 - updating i18n extracting rake task and makefile

(cherry picked from commit ab5c02365e8cb9ac66e72c6ba2d9c2a90350bd9f)
Fixes #4196 "Power ON this machine" disappeared for new VMWare hosts

(cherry picked from commit 39505a60be16d5af7f1c42e5ef175bec27607190)