use travis cache

Author: nightwing

.travis.yml

@@ -1,15 +1,19 @@
 language: node_js
 
-node_js:
-    - "0.10"
+# use default node version
+# node_js:
+#    - "0.10"
 
 script:
-    - npm i
-    - npm i -g eslint
-    - eslint "lib/ace/**/*.js"
+    - npm i eslint
+    - node node_modules/eslint/bin/eslint "lib/ace/**/*.js"
     - npm test
 
 matrix:
     fast_finish: false
 
+cache:
+    directories:
+        - node_modules
+
 sudo: false