Rails 3: Replace Rails.root => Refinery.root in engine.
Rails 3: Replace Rails.root => Refinery.root in engine.

* Not sure if this is the right resolution (Refinery / Rails Engine
  initialization may still need to be refactored), but in the boot
  sequence, Rails.root is not yet defined.

Signed-off-by: Alex Coles <60c6d277a8bd81de7fdde19201bf9c58a3df08f4@alexcolesportfolio.com>

KingLemuel/refinerycms,KingLemuel/refinerycms,johanb/refinerycms,mlinfoot/refinerycms,bryanmtl/g-refinerycms,koa/refinerycms,bricesanchez/refinerycms,louim/refinerycms,anitagraham/refinerycms,refinery/refinerycms,trevornez/refinerycms,gwagener/refinerycms,simi/refinerycms,mkaplan9/refinerycms,mojarra/myrefinerycms,kappiah/refinerycms,LytayTOUCH/refinerycms,kelkoo-services/refinerycms,aguzubiaga/refinerycms,hoopla-software/refinerycms,Eric-Guo/refinerycms,Retimont/refinerycms,gwagener/refinerycms,aguzubiaga/refinerycms,KingLemuel/refinerycms,bricesanchez/refinerycms,hoopla-software/refinerycms,mabras/refinerycms,sideci-sample/sideci-sample-refinerycms,koa/refinerycms,kappiah/refinerycms,kappiah/refinerycms,mlinfoot/refinerycms,trevornez/refinerycms,donabrams/refinerycms,LytayTOUCH/refinerycms,chrise86/refinerycms,bryanmtl/g-refinerycms,donabrams/refinerycms,aguzubiaga/refinerycms,simi/refinerycms,mlinfoot/refinerycms,mobilityhouse/refinerycms,mkaplan9/refinerycms,LytayTOUCH/refinerycms,anitagraham/refinerycms,stefanspicer/refinerycms,Retimont/refinerycms,stakes/refinerycms,trevornez/refinerycms,mkaplan9/refinerycms,stefanspicer/refinerycms,louim/refinerycms,Eric-Guo/refinerycms,gwagener/refinerycms,johanb/refinerycms,refinery/refinerycms,stefanspicer/refinerycms,kelkoo-services/refinerycms,johanb/refinerycms,mabras/refinerycms,refinery/refinerycms,simi/refinerycms,Eric-Guo/refinerycms,mabras/refinerycms,mojarra/myrefinerycms,sideci-sample/sideci-sample-refinerycms,SmartMedia/refinerycms-with-custom-icons,chrise86/refinerycms,stakes/refinerycms,SmartMedia/refinerycms-with-custom-icons,simi/refinerycms,mobilityhouse/refinerycms,pcantrell/refinerycms,Retimont/refinerycms,pcantrell/refinerycms,anitagraham/refinerycms,chrise86/refinerycms,hoopla-software/refinerycms