Raise an error if the asset pipeline is not configured or is disabled. The user should not activate sass rails in these cases.
Raise an error if the asset pipeline is not configured or is disabled. The user should not activate sass rails in these cases.

glebtv/sass-rails,tshotoku/sass-rails,universsky/sass-rails,rails/sass-rails,eileencodes/sass-rails,ipmobiletech/sass-rails,hazarin/sass-rails,slobodankovacevic/sass-rails,atambo/sass-rails,maclover7/sass-rails,Andreis13/sass-rails,atambo/sass-rails,zendesk/sass-rails,jcpetkovich/sass-rails