public static function loadFilters() {
		
		// load defaults
		$filterDir = Config::getOption("sourceDir").DIRECTORY_SEPARATOR."_twig-components/filters";
		$filterExt = Config::getOption("twigFilterExt");
		$filterExt = $filterExt ? $filterExt : "filter.php";
		
		if (is_dir($filterDir)) {
			
			// loop through the filter dir...
			$finder = new Finder();
			$finder->files()->name("*\.".$filterExt)->in($filterDir);
			$finder->sortByName();
			foreach ($finder as $file) {
				
				// see if the file should be ignored or not
				$baseName = $file->getBasename();
				if ($baseName[0] != "_") {
					
					include($file->getPathname());
					
					// $filter should be defined in the included file
					if (isset($filter)) {
						self::$instance->addFilter($filter);
						unset($filter);
					}
					
				}
				
			}
			
		}
		
	}