Tweak the example build process. Move example -> examples/trivial to we can have more than one. Update README appropriately.

example/lib/index.js

@@ -1,30 +0,0 @@
-/*
-Copyright 2015 OpenMarket 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.
-*/
-
-'use strict';
-
-var React = require("react");
-// In normal usage of the module:
-//var MatrixReactSdk = require("matrix-react-sdk");
-// Or to import the source directly from the file system:
-// (This is useful for debugging the SDK as it seems source
-// maps cannot pass through two stages).
-var MatrixReactSdk = require("../../src/index");
-
-React.render(
-    <MatrixReactSdk.MatrixChat />,
-    document.getElementById('matrixchat')
-);