fix .travis.yml

.travis.yml

@@ -5,7 +5,7 @@ before_install:
   - "export DISPLAY=:99.0"
   - "sh -e /etc/init.d/xvfb start"
   - sudo apt-get -qq update
-  - sudo apt-get -qq install node-less
+  - sudo apt-get -qq install less node-less
 install:
   - "make"
 script: