Updated full calendar to 1.6.4

Calendar/Upcoming now update on grab/download events
Better use of backbone collection on calendar
New: Calendar will auto refresh when episodes are grabbed and downloaded

src/UI/Handlebars/Helpers/Episode.js

@@ -20,6 +20,7 @@ define(
         Handlebars.registerHelper('StatusLevel', function () {
 
             var hasFile = this.hasFile;
+            var downloading = require('History/Queue/QueueCollection').findEpisode(this.id) || this.downloading;
             var currentTime = Moment();
             var start = Moment(this.airDateUtc);
             var end = Moment(this.end);
@@ -28,6 +29,10 @@ define(
                 return 'success';
             }
 
+            if (downloading) {
+                return 'purple';
+            }
+
             if (currentTime.isAfter(start) && currentTime.isBefore(end)) {
                 return 'warning';
             }