Add InAppBrowser plugin for external links
Hijack click event for links to open in system browser

- Seems that new versions of Phonegap don't respond to
  a simple target="_blank" in an <a> tag.  Need to use
  the inAppBrowser plugin and set the target to
  _system

- https://github.com/apache/cordova-plugin-inappbrowser/blob/master/doc/index.md
Make custom icon/splash work for iOS