Hardcode connectors' filenames

.. as they don't change often and is waste of resources to loop on then on each run, also to maintain interoperability #517

includes/connectors.php

@@ -35,16 +35,23 @@ public static function load() {
 
 		require_once WP_STREAM_INC_DIR . 'connector.php';
 
-		$found = wp_cache_get( 'connectors_glob', 'wp_stream' );
-		if ( empty( $found ) ) {
-			$found = glob( WP_STREAM_DIR . 'connectors/*.php' );
-			wp_cache_set( 'connectors_glob', $found, 'wp_stream' );
-		}
+		$connectors = array(
+			'blogs',
+			'comments',
+			'editor',
+			'installer',
+			'media',
+			'menus',
+			'posts',
+			'settings',
+			'taxonomies',
+			'users',
+			'widgets',
+		);
 		$classes = array();
-		foreach ( $found as $class ) {
-			include_once $class;
-			$class_name = ucwords( preg_match( '#(.+)\.php#', basename( $class ), $matches ) ? $matches[1] : '' );
-			$class      = "WP_Stream_Connector_$class_name";
+		foreach ( $connectors as $connector ) {
+			include_once WP_STREAM_DIR . '/connectors/' . $connector .'.php';
+			$class      = "WP_Stream_Connector_$connector";
 			$classes[]  = $class;
 		}