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/studyBrowser/studyBrowser/studyBrowser.html

@@ -0,0 +1,11 @@
+<template name="studyBrowser">
+    <div class="studyBrowser">
+        <div class="scrollableStudyThumbnails">
+            {{#each study in studies}}
+                {{#each thumbnail in (sort (studyThumbnails study) thumbnailSortBy thumbnailSortType)}}
+                    {{>thumbnailEntry thumbnail=thumbnail}}
+                {{/each}}
+            {{/each}}
+        </div>
+    </div>
+</template>

Packages/ohif-viewerbase/client/components/studyBrowser/studyBrowser/studyBrowser.js

@@ -0,0 +1,7 @@
+Template.studyBrowser.helpers({
+    studies() {
+        return ViewerStudies.find({
+            selected: true
+        });
+    }
+});

Packages/ohif-viewerbase/client/components/studyBrowser/studyBrowser/studyBrowser.styl

@@ -0,0 +1,19 @@
+.studyBrowser
+  float: left
+  height: 100%
+  width: 100%
+  overflow: hidden
+  background-color: black
+  padding-bottom: 20px
+
+  .scrollableStudyThumbnails
+    height: 100%
+    overflow-y: auto
+    overflow-x: hidden
+    padding-bottom: 50px
+    padding-right: 16px
+    padding-left: 4px
+    margin-right: -16px
+
+    &::-webkit-scrollbar
+      display: none