add .travis.yml for travis builds

.travis.yml

@@ -0,0 +1,8 @@
+sudo: false
+language: node_js
+node_js:
+- 6.1.x
+
+notifications:
+  email:
+  - saitejas464@gmail.com

package.json

@@ -31,6 +31,9 @@
   },
   "optionalDependencies": {},
   "main": "./parser",
+  "scripts": {
+    "test": "mocha"
+  },
   "maintainers": [
     {
       "name": "Sai Teja",