Change script location.

Split js code.
Added cache and changed loading mechanism for js sources.

script/features/delete_objects_handler/index.js

@@ -0,0 +1,52 @@
+doInclude ([
+  include ("features/base_handler/index.js")
+])
+
+/**
+ * Delete Graph handler.
+ *
+ */
+function DeleteGraphHandler(app)
+{
+  this.removeStack = true;
+  BaseHandler.apply(this, arguments);
+  this.message = g_selectObjectToDelete;
+  this.addContextMenu();
+}
+
+// inheritance.
+DeleteGraphHandler.prototype = Object.create(BaseHandler.prototype);
+
+DeleteGraphHandler.prototype.MouseDown = function(pos) 
+{
+	var selectedObject = this.GetSelectedObject(pos);
+        
+    if (!this.app.IsCorrectObject(selectedObject))
+        return;
+    
+    this.app.PushToStack("Delete");
+    this.app.DeleteObject(selectedObject);
+	this.needRedraw = true;
+}
+
+/**
+ * Delete Graph handler.
+ *
+ */
+function DeleteAllHandler(app)
+{
+  BaseHandler.apply(this, arguments);  
+}
+
+// inheritance.
+DeleteAllHandler.prototype = Object.create(BaseHandler.prototype);
+
+DeleteAllHandler.prototype.clear = function() 
+{	
+    this.app.PushToStack("DeleteAll");
+
+	// Selected Graph.
+    this.app.graph = new Graph(); 
+    this.app.savedGraphName = "";
+    this.needRedraw = true;
+}