Try to enable all webidls (#573)

* Try to enable all webidls

* Separate out unavailable webidl files by reason.

* Create record of fully tested WebIDL files

* Update notes to reflect new situation with web-idl

* Make a blank ident fail, disable the necessary widls.

It turns out that all the blank idents came from blank enum variants,
which is allowed in webidl apparently.

crates/web-sys/webidls/enabled/BatteryManager.webidl

@@ -0,0 +1,23 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.w3.org/TR/battery-status/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+interface BatteryManager : EventTarget {
+    readonly attribute boolean             charging;
+    readonly attribute unrestricted double chargingTime;
+    readonly attribute unrestricted double dischargingTime;
+    readonly attribute double              level;
+
+             attribute EventHandler        onchargingchange;
+             attribute EventHandler        onchargingtimechange;
+             attribute EventHandler        ondischargingtimechange;
+             attribute EventHandler        onlevelchange;
+};