message: feat(aio): move search results under search box
  This enables keyboarders to tab from the search box into the results.
  Important for a11y according to issue
diff: <aio-search-box class="search-container" #searchBox></aio-search-box>
  <span class="fill-remaining-space"></span>
  </md-toolbar>
  +<aio-search-results #searchResults></aio-search-results>
  <a id="top-of-page"></a>
  <md-sidenav-container class="sidenav-container" [class.starting]="isStarting" role="main">
  </md-sidenav-container>
  -<aio-search-results #searchResults></aio-search-results>
  <footer>
  <aio-footer [nodes]="footerNodes" [versionInfo]="versionInfo" ></aio-footer>
  