new file dialog!

-ItemList control for easier lists/thumbnails
-New file dialog, with support for thumbnails, favorites, recent places,
etc
-Moved .fscache out of the project, no more bugs due to committed/pulled
.fscache!
-Dir dialog now sorts directories

tools/editor/scene_tree_dock.cpp

@@ -171,7 +171,7 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 			if (!_validate_no_foreign())
 				break;
 
-			file->set_mode(FileDialog::MODE_OPEN_FILE);
+			file->set_mode(EditorFileDialog::MODE_OPEN_FILE);
 			List<String> extensions;
 			ResourceLoader::get_recognized_extensions_for_type("PackedScene",&extensions);
 			file->clear_filters();
@@ -484,7 +484,7 @@ void SceneTreeDock::_notification(int p_what) {
 				"MoveDown",
 				"Duplicate",
 				"Reparent",
-				"Del",
+				"Remove",
 			};
 
 			for(int i=0;i<TOOL_BUTTON_MAX;i++)
@@ -1355,7 +1355,7 @@ SceneTreeDock::SceneTreeDock(EditorNode *p_editor,Node *p_scene_root,EditorSelec
 	accept = memnew( AcceptDialog );
 	add_child(accept);
 
-	file = memnew( FileDialog );
+	file = memnew( EditorFileDialog );
 	add_child(file);
 	file->connect("file_selected",this,"instance");
 	set_process_unhandled_key_input(true);