title: UIWebView LoadData is not accepting Nil values for textEncodingName and baseURL
body: <p>Till Swift 1.2 version, UIWebView LoadData was accepting nil values, but Swift 2.0 is throwing error "Swift does not conform to protocol NilLateralConvertible".</p>
  
  <p>Swift 1.2: Works fine</p>
  
  <pre><code>self.webView.loadData(tempData!, MIMEType: "application/pdf", textEncodingName: nil, baseURL: nil)
  </code></pre>
  
  <p>Swift 2.0: Throws error</p>
  
  <pre><code>self.webView.loadData(tempData!, MIMEType: "application/pdf", textEncodingName: nil, baseURL: nil)
  </code></pre>