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/displaySetNavigation/displaySetNavigation.html

@@ -0,0 +1,16 @@
+<template name="displaySetNavigation">
+    <div id="{{this.id}}"
+         class="toolbarSectionButton rp-x-1 {{this.classes}} {{#if isNext}}js-next{{else}}js-prev{{/if}} {{#if (disableButton isNext)}}disabled{{/if}}"
+         title="{{this.title}}">
+        <div class="svgContainer">
+            {{#if isNext}}
+                <i class="fa fa-toggle-down fa-fw"></i>
+            {{else}}
+                <i class="fa fa-toggle-up fa-fw"></i>
+            {{/if}}
+        </div>
+        <div class="buttonLabel">
+            {{#if isNext}}Next{{else}}Previous{{/if}}
+        </div>
+    </div>
+</template>