Made sort configurable with the original value as the default. Now it can be…

Made sort configurable with the original value as the default. Now it can be passed in on the command line similar to 'limit'

variety.js

@@ -60,6 +60,9 @@ print("Using limit of " + limit);
 if (typeof maxDepth === "undefined") { var maxDepth = 99; }
 print("Using maxDepth of " + maxDepth);
 
+if (typeof sort === "undefined") { var sort = {_id: -1}; }
+print("Using sort of " + tojson(sort));
+
 varietyCanHaveChildren = function (v) {
   var isArray = v && 
                 typeof v === 'object' && 
@@ -185,7 +188,7 @@ var addVarietyResults = function(result) {
 }
 
 // main cursor
-db[collection].find(query).sort({_id: -1}).limit(limit).forEach(function(obj) {
+db[collection].find(query).sort(sort).limit(limit).forEach(function(obj) {
   var recordResult = {};
   for (var key in obj) {
     if(obj.hasOwnProperty(key)) {