Merged LesionTracker and OHIF Viewer, refactored out common components

Packages/viewerbase/lib/stringToUint8Array.js

@@ -0,0 +1,7 @@
+stringToUint8Array = function(str) {
+  var uint=new Uint8Array(str.length);
+  for(var i=0,j=str.length;i<j;i++){
+    uint[i]=str.charCodeAt(i);
+  }
+  return uint;
+};