Replaced OHIF Logo PNG with SVG

OHIFViewer/client/components/ohifViewer/ohifViewer.html

@@ -2,7 +2,9 @@
     <div class="topBar noselect {{#if onStudyList}}studyList{{/if}}">
         <div class="clearfix p-x-1 p-t-1">
             <a class="brandSection pull-left" href="http://ohif.org">
-                <img class="logoImage" src="/images/logo.png">
+                <svg class="logoImage">
+                    <use xlink:href="/packages/viewerbase/assets/icons.svg#icon-ohif-logo"></use>
+                </svg>
                 <div class="logoText">
                     Open Health Imaging Foundation
                 </div>