Bump Recess to v1.1.8 to fix further less.js version problems

Apparently Recess v1.1.7 had another problem:
https://github.com/twitter/recess/pull/100

package.json

@@ -19,7 +19,7 @@
   , "devDependencies": {
       "uglify-js": "1.3.4"
     , "jshint": "0.9.1"
-    , "recess": "1.1.7"
+    , "recess": "1.1.8"
     , "connect": "2.1.3"
     , "hogan.js": "2.0.0"
   }