Add separate import file for indxexeddb worker

And removing it from the main one

src/indexeddb-worker.js

@@ -0,0 +1,24 @@
+/*
+Copyright 2017 Vector Creations Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+/**
+ * Separate exports file for the indexeddb web worker, which is designed
+ * to be used separately
+ */
+
+/** The {@link module:indexeddb-store-worker~IndexedDBStoreWorker} class. */
+module.exports.IndexedDBStoreWorker = require("./store/indexeddb-store-worker.js");
+

src/matrix.js

@@ -61,8 +61,6 @@ module.exports.Filter = require("./filter");
 module.exports.TimelineWindow = require("./timeline-window").TimelineWindow;
 /** The {@link module:interactive-auth} class. */
 module.exports.InteractiveAuth = require("./interactive-auth");
-/** The {@link module:indexeddb-store-worker~IndexedDBStoreWorker} class. */
-module.exports.IndexedDBStoreWorker = require("./store/indexeddb-store-worker.js");
 
 
 /**