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/gridLayout/gridLayout.html

@@ -0,0 +1,11 @@
+<template name="gridLayout">
+    <div id='imageViewerViewports'>
+        {{#each viewport in viewports}}
+            <div class="viewportContainer" style="height:{{height}}%;width:{{width}}%;">
+                <div class="removable">
+                    {{>imageViewerViewport (clone viewport)}}
+                </div>
+            </div>
+        {{/each}}
+    </div>
+</template>