Fix Range ctor with optional options parameter (#2468)

lib/timeline/Range.js

@@ -14,8 +14,17 @@ var DateUtil = require('./DateUtil');
  */
 function Range(body, options) {
   var now = moment().hours(0).minutes(0).seconds(0).milliseconds(0);
-  this.start = options.start || now.clone().add(-3, 'days').valueOf(); 
-  this.end = options.end || now.clone().add(4, 'days').valueOf();  
+  var start = now.clone().add(-3, 'days').valueOf();
+  var end = now.clone().add(-3, 'days').valueOf(); 
+
+  if(options === undefined) {
+    this.start = start;
+    this.end = end;
+  } else {
+    this.start = options.start || start
+    this.end = options.end || end
+  }
+
   this.rolling = false;
 
   this.body = body;