Add support for indexeddb sync in webworker

webpack.config.js

@@ -6,6 +6,7 @@ var HtmlWebpackPlugin = require('html-webpack-plugin');
 module.exports = {
     entry: {
         "bundle": "./src/vector/index.js",
+        "indexeddb-worker": "./src/vector/indexedbd-worker.js",
 
         // We ship olm.js as a separate lump of javascript. This makes it get
         // loaded via a separate <script/> tag in index.html (which loads it