Add OSViewer link to footer

Fixes #1306

app/views/partials/home-footer.html

@@ -12,7 +12,7 @@
        </a>
      </li>
      <li class="viewer">
        <a>
        <a href="/s/">
          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 138.25 22.95"><title>OSViewer</title><path class="a" d="M47.44,15.09L52.78,1.74h5.07l-8.43,21h-4L37,1.74H42.1Z"/><path class="a" d="M59.51,4.52a2.55,2.55,0,0,1-.76-1.87A2.55,2.55,0,0,1,59.51.77a2.68,2.68,0,0,1,3.75,0A2.55,2.55,0,0,1,64,2.64a2.55,2.55,0,0,1-.77,1.88A2.68,2.68,0,0,1,59.51,4.52Zm4.13,18.2h-4.5V6.57h4.5V22.71Z"/><path class="a" d="M81.13,20.37A9,9,0,0,1,74.72,23a8.5,8.5,0,0,1-6.08-2.27,8,8,0,0,1-2.4-6.08,7.83,7.83,0,0,1,2.44-6.06A8.25,8.25,0,0,1,74.47,6.3a8.35,8.35,0,0,1,5.65,2,6.91,6.91,0,0,1,2.33,5.52v2.4H70.69a3.21,3.21,0,0,0,1.38,2.16,4.41,4.41,0,0,0,2.64.84,5.18,5.18,0,0,0,3.9-1.59ZM76.81,10.8A3.41,3.41,0,0,0,74.54,10a4.05,4.05,0,0,0-2.44.81A3.1,3.1,0,0,0,70.81,13h7.08A3.2,3.2,0,0,0,76.81,10.8Z"/><path class="a" d="M93.19,22.71H88.54L83.05,6.57H87.7l3.15,9.75L94,6.57h4.35l3.15,9.75,3.15-9.75h4.68l-5.49,16.14H99.16l-3-8.79Z"/><path class="a" d="M125.08,20.37a9,9,0,0,1-6.4,2.58,8.5,8.5,0,0,1-6.08-2.27,8,8,0,0,1-2.4-6.08,7.84,7.84,0,0,1,2.45-6.06,8.25,8.25,0,0,1,5.78-2.25,8.35,8.35,0,0,1,5.65,2,6.91,6.91,0,0,1,2.33,5.52v2.4H114.64A3.2,3.2,0,0,0,116,18.39a4.41,4.41,0,0,0,2.64.84,5.18,5.18,0,0,0,3.9-1.59Zm-4.32-9.57a3.41,3.41,0,0,0-2.27-.78,4.05,4.05,0,0,0-2.44.81A3.1,3.1,0,0,0,114.76,13h7.08A3.2,3.2,0,0,0,120.76,10.8Z"/><path class="a" d="M137.38,10.53a3.41,3.41,0,0,0-3,1.43,6.48,6.48,0,0,0-1,3.77v7h-4.5V6.57h4.5V8.7A7.57,7.57,0,0,1,135.56,7a5.91,5.91,0,0,1,2.65-.72l0,4.23h-0.87Z"/><path class="a" d="M18.84,19.81A10.78,10.78,0,0,1,11,22.92a10.77,10.77,0,0,1-7.83-3.11A10.36,10.36,0,0,1,0,12.09,10.36,10.36,0,0,1,3.18,4.36,10.77,10.77,0,0,1,11,1.26a10.78,10.78,0,0,1,7.83,3.1A10.36,10.36,0,0,1,22,12.09,10.36,10.36,0,0,1,18.84,19.81ZM17.25,12.1a6.86,6.86,0,0,0-1.8-4.79,5.75,5.75,0,0,0-4.43-2,5.75,5.75,0,0,0-4.42,2A6.86,6.86,0,0,0,4.8,12.1a6.81,6.81,0,0,0,1.8,4.77,5.77,5.77,0,0,0,4.42,2,5.77,5.77,0,0,0,4.43-2A6.81,6.81,0,0,0,17.25,12.1Z"/><path class="a" d="M24.85,5.92a1.81,1.81,0,0,0-.67,1.47A1.66,1.66,0,0,0,25,8.85a15.08,15.08,0,0,0,3.81,1.27,10.73,10.73,0,0,1,4.64,2.21,5.45,5.45,0,0,1,1.65,4.29A5.66,5.66,0,0,1,33,21.19,8.43,8.43,0,0,1,27.42,23a12.88,12.88,0,0,1-9-3.69l2.79-3.42q3.39,3,6.27,3a3.29,3.29,0,0,0,2-.55,1.78,1.78,0,0,0,.73-1.5,1.75,1.75,0,0,0-.78-1.5,10.19,10.19,0,0,0-3.09-1.13A13.43,13.43,0,0,1,21,11.86a5.35,5.35,0,0,1-1.69-4.38,5.43,5.43,0,0,1,2.15-4.6,8.63,8.63,0,0,1,5.35-1.62,12.88,12.88,0,0,1,4.2.72,11.25,11.25,0,0,1,3.66,2L32.34,7.44A9.24,9.24,0,0,0,26.7,5.37,2.82,2.82,0,0,0,24.85,5.92Z"/></svg>
        </a>
      </li>