update .travis.yml

.travis.yml

 language: node_js
 
-matrix:
-    include:
-        - env: NODE_SCRIPT=node
-          node_js: "0.11"
-        - env: NODE_SCRIPT=node
-          node_js: "0.10"
-        - env: NODE_SCRIPT=./iojs-v1.0.2-linux-x64/bin/iojs
-
-script:
-    - $NODE_SCRIPT /home/travis/.nvm/$(node --version)/bin/mocha
+node_js:
+    - "0.12"
+    - "0.11"
+    - "0.10"
+    - "iojs"
 
 before_script:
     - "npm install -g npm"
     - "npm install -g gulp"
     - "npm install -g mocha"
     - "gulp allCoffee"
-    - "wget https://iojs.org/dist/v1.0.2/iojs-v1.0.2-linux-x64.tar.xz"
-    - "tar xvfJ iojs-v1.0.2-linux-x64.tar.xz"