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/playClipButton/playClipButton.html

@@ -0,0 +1,16 @@
+<template name="playClipButton">
+    <div id="{{this.id}}"
+         class="toolbarSectionButton rp-x-1 {{this.classes}} {{activeClass}} {{#if isPlaying}}active{{/if}} {{#if (disableButton)}}disabled{{/if}}"
+         title="{{this.title}}">
+        <div class="svgContainer">
+            {{#if isPlaying}}
+                <i class="fa fa-stop fa-fw"></i>
+            {{else}}
+                <i class="fa fa-play fa-fw"></i>
+            {{/if}}
+        </div>
+        <div class="buttonLabel">
+            {{#if isPlaying}}Stop{{else}}Play{{/if}}
+        </div>
+    </div>
+</template>