Upgraded sass gem

Author: jasnow

Gemfile.lock

@@ -275,7 +275,7 @@ GEM
     ruby-prof (0.17.0)
     ruby-progressbar (1.10.0)
     ruby_dep (1.5.0)
-    sass (3.7.3)
+    sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)