feat(resize): add start/stop/resize event triggers

Author: vieron

src/jquery.gridster.js

@@ -1133,6 +1133,8 @@
 		if (this.options.resize.start) {
             this.options.resize.start.call(this, event, ui, this.$resized_widget);
         }
+
+        this.$el.trigger('gridster:resizestart');
     };
 
 
@@ -1169,6 +1171,8 @@
         if (this.options.resize.stop) {
             this.options.resize.stop.call(this, event, ui, this.$resized_widget);
         }
+
+        this.$el.trigger('gridster:resizestop');
     };
 
     /**
@@ -1256,6 +1260,8 @@
             this.options.resize.resize.call(this, event, ui, this.$resized_widget);
         }
 
+        this.$el.trigger('gridster:resize');
+
         this.resize_last_sizex = size_x;
         this.resize_last_sizey = size_y;
     };