Commented a lot of functions. Tried to get jsDoc and/or docco to work

Packages/viewerbase/lib/createStacks.js

@@ -1,7 +1,22 @@
+/**
+ * Creates a set of series to be placed in the Study Browser
+ * The series that appear in the Study Browser must represent
+ * imaging modalities.
+ *
+ * Furthermore, for drag/drop functionality,
+ * it is easiest if the stack objects also contain information about
+ * which study they are linked to.
+ *
+ * @param study The study instance to be used
+ * @returns {Array} An array of series to be placed in the Study Browser
+ */
 createStacks = function(study) {
+    // Define an empty array of stacks
     var stacks = [];
+
     // TODO: Split by multi-frame, modality, image size, etc
     study.seriesList.forEach(function(series) {
+        // If the series has no instanced, skip it
         if (!series.instances) {
             return;
         }
@@ -13,7 +28,10 @@ createStacks = function(study) {
             return;
         }
 
+        // Include the study instance Uid for drag/drop purposes
         series.studyInstanceUid = study.studyInstanceUid;
+
+        // Add this series to the list of stacks
         stacks.push(series);
     });
     return stacks;