Fix error: undefined method application

Author: marocchino

lib/compass-rails.rb

@@ -75,7 +75,7 @@ def installer(*args)
     end
 
     def rails_loaded?
-      defined?(::Rails) && Rails.application
+      defined?(::Rails)
     end
 
     def rails_version
@@ -216,7 +216,7 @@ def boot_config
     end
 
   def asset_pipeline_enabled?
-    return false unless rails_loaded?
+    return false unless rails_loaded? && ::Rails.respond_to?(:application) && !::Rails.application.nil?
     rails_config = ::Rails.application.config
     if rails_config.respond_to?(:assets)
       rails_config.assets.enabled != false