Cleanup NPM package

Removes .jshintrc, .npmignore, test.js and .travis.yml from NPM package.

Author: jorrit

package.json

@@ -33,5 +33,6 @@
     "mocha": "^3.2.0",
     "proxyquire": "^1.7.4",
     "sinon": "^1.17.3"
-  }
+  },
+  "files": []
 }