title: Unrecognized font family ionicons
body: <p>I  followed the setup instructions in the <a href="http://nativebase.io/documentation" rel="noreferrer">NativeBase Docs</a> and ran <code>rnpm link</code>. I am getting this error: 
  <a href="http://i.stack.imgur.com/DjfZB.png" rel="noreferrer">Unrecognized font family ionicons</a></p>
  
  <p>also checked by Xcode, the fonts are already in the build phase.
  What am I missing?</p>