Add greasemonkey globals (#163)

Author: minig0d

globals.json

@@ -1537,17 +1537,25 @@
 		"exportFunction": false,
 		"GM": false,
 		"GM_addStyle": false,
+		"GM_addValueChangeListener": false,
 		"GM_deleteValue": false,
+		"GM_download": false,
 		"GM_getResourceText": false,
 		"GM_getResourceURL": false,
+		"GM_getTab": false,
+		"GM_getTabs": false,
 		"GM_getValue": false,
 		"GM_info": false,
 		"GM_listValues": false,
 		"GM_log": false,
+		"GM_notification": false,
 		"GM_openInTab": false,
 		"GM_registerMenuCommand": false,
+		"GM_removeValueChangeListener": false,
+		"GM_saveTab": false,
 		"GM_setClipboard": false,
 		"GM_setValue": false,
+		"GM_unregisterMenuCommand": false,
 		"GM_xmlhttpRequest": false,
 		"unsafeWindow": false
 	},