Switch travis.yml to use nodejs

.travis.yml

@@ -1,15 +1,29 @@
-language: objective-c
+language: node_js
 
-notifications:
-  email:
-    on_success: never
-    on_failure: change
+sudo: false
 
-script: ./script/cibuild
+addons:
+  apt:
+    sources:
+    - ubuntu-toolchain-r-test
+    packages:
+    - g++-4.8
 
 git:
   depth: 10
 
+node_js:
+  - "0.12"
+  - "node"
+
+env:
+  - CC=gcc-4.8 CXX=g++-4.8
+
 branches:
   only:
     - master
+
+notifications:
+  email:
+    on_success: never
+    on_failure: change