Work on refactoring measurements out of Lesion Tracker package

- Removed AssociatedStudies Collection
- Measurement API is generated from configuration files
- Data exchange methods are defined in configuration

Packages/ohif-viewerbase/client/components/viewer/imageControls/imageControls.html

@@ -0,0 +1,11 @@
+<template name="imageControls">
+    <div class="imageControls">
+        <div id="scrollbar">
+            <input id="imageSlider"
+            	   type="range"
+            	   min="1"
+            	   value="{{imageIndex}}"
+            	   max="{{numImages}}"/>
+        </div>
+    </div>
+</template>