title: Dot (nested) notation in Angular's interpolate system
body: <p>Say I have an object such as:</p>
  
  <pre><code>obj = {foo: 42, bar: 'moo'}
  </code></pre>
  
  <p>And an interpolate string such as:</p>
  
  <pre><code>s = 'Do {{ bar }} {{ foo }} times.'
  </code></pre>
  
  <p>Interpolating this in Angular:</p>
  
  <pre><code>var interp = $interpolate(s);
  var res = interp(obj);
  console.log(res);  // &lt;--- This will return 'Do moo 42 times.'
  </code></pre>
  
  <p>Is there a way I can express dotted/nested notation? Example:</p>
  
  <pre><code>obj = {n: {foo: 42}, bar: 'moo'}
  s = 'Do {{ bar }} {{ n.foo }} times.'  // &lt;--- This doesn't work
  
  var interp = $interpolate(s);
  var res = interp(obj);
  console.log(res);
  </code></pre>