title: No binary for PhantomJS browser on your platform. Please, set "PHANTOMJS_BIN" env variable
body: <p>My package.json looks like this..</p>
  
  <pre><code>"karma-phantomjs-launcher": "^0.1.4",
  "karma-safari-launcher": "^0.1.1",
  "karma-sinon-chai": "~0.2.0",
  "karma-spec-reporter": "~0.0.16",
  "mocha": "~1.20.1"
  </code></pre>
  
  <p>my npm version is 2.2.0</p>
  
  <p>whay am I getting this when I run karma test - karma start my.conf.js</p>