Dojo framework version 3 (#333)

* Upgrade examples to dojo 3.0

* Update Dojo 2 references to Dojo

* Legacy build for IE

* legacy false

* dojo/widgets

* Add dojo/core back for sandbox

* Update to themes 3.0.1

README.md

@@ -2,9 +2,9 @@
 
 [![Build Status](https://travis-ci.org/dojo/examples.svg?branch=master)](https://travis-ci.org/dojo/examples)
 
-This repository contains example applications built using Dojo 2.
+This repository contains example applications built using Dojo.
 
-For current progress on Dojo 2, contribution guidelines and other information, please visit [`dojo/meta`](https://github.com/dojo/meta).
+For current progress on Dojo, contribution guidelines and other information, please visit [`dojo/meta`](https://github.com/dojo/meta).
 
 - [Examples](#examples)
 - [How do I contribute?](#how-do-i-contribute)
@@ -17,13 +17,13 @@ Here is a table of the current examples available in this repository complete wi
 
 | Example  | Code  | Demo  | Overview  |
 |---|---|---|---|
-|  todoMVC  | [Link](./todo-mvc)  | [Link](https://dojo.github.io/examples/todo-mvc)  | A reference implementation of [TodoMVC](http://todomvc.com/) built with current Dojo 2 packages.  |
-|  todoMVC Kitchen Sink | [Link](./todo-mvc-kitchensink)  | [Link](https://dojo.github.io/examples/todo-mvc-kitchensink)  |   A feature-rich version of TodoMVC, built Dojo 2 packages. |
-| todoMVC - tsx  |  [Link](./todo-mvc-tsx) | [Link](https://dojo.github.io/examples/todo-mvc-tsx) | A reference implementation of [TodoMVC](http://todomvc.com/) built using `tsx`, [Redux](https://github.com/reactjs/redux)  and Dojo 2 packages.  |
+|  todoMVC  | [Link](./todo-mvc)  | [Link](https://dojo.github.io/examples/todo-mvc)  | A reference implementation of [TodoMVC](http://todomvc.com/) built with current Dojo packages.  |
+|  todoMVC Kitchen Sink | [Link](./todo-mvc-kitchensink)  | [Link](https://dojo.github.io/examples/todo-mvc-kitchensink)  |   A feature-rich version of TodoMVC, built Dojo packages. |
+| todoMVC - tsx  |  [Link](./todo-mvc-tsx) | [Link](https://dojo.github.io/examples/todo-mvc-tsx) | A reference implementation of [TodoMVC](http://todomvc.com/) built using `tsx`, [Redux](https://github.com/reactjs/redux)  and Dojo packages.  |
 | hnpwa  |  [Link](./hnpwa) | [Link](https://dojo-2-hnpwa-d668d.firebaseapp.com/) | Progressive Web application Hacker News implementation of [HNPWA](https://http://hnpwa.com/).  |
 | Widget Showcase  |  [Link](./widget-showcase/README.md)  | [Link](https://dojo.github.io/examples/widget-showcase)  | Show case widgets from [@dojo/widgets](https://github.com/dojo/widgets).  |
 | Custom Element Widget Showcase | [Link](./custom-element-showcase/README.md) | [Link](https://dojo.github.io/examples/custom-element-showcase) |  Demonstrates using @dojo/widgets distributed as compiled custom elements. |
-| Custom Element Menu |  [Link](./custom-element-menu/README.md) |  [Link](https://dojo.github.io/examples/custom-element-menu) | Demonstrates custom element usage against standard Dojo 2 widget usage. |
+| Custom Element Menu |  [Link](./custom-element-menu/README.md) |  [Link](https://dojo.github.io/examples/custom-element-menu) | Demonstrates custom element usage against standard Dojo widget usage. |
 | RealWorld Application | [Link](./realworld/README.md) |  [Link](https://dojo.github.io/examples/realworld) | A realworld implementation of a medium clone, conduit.  |
 | Intersection Observer | [Link](./intersection-observer/README.md)   |  [Link](https://dojo.github.io/examples/intersection-observer/)  |  Demonstrates using the [`Intersection`](https://github.com/dojo/widget-core#intersection) meta for creating an infinite scrolling list. |
 | Resize Observer | [Link](./resize-observer/README.md) |  [Link](https://dojo.github.io/examples/resize-observer/)  |  Demonstrates using the [`Resize`](https://github.com/dojo/widget-core#resize) meta for creating responsive components that dynamically modify the way they are renderd based on the space available to them. |

custom-element-menu/README.md

@@ -1,6 +1,6 @@
-# Dojo2 Custom Element Menu Demo
+# Dojo Custom Element Menu Demo
 
-Implementation of a basic menu widget that demonstrates using as custom elements against standard Dojo 2 widgets.
+Implementation of a basic menu widget that demonstrates using as custom elements against standard Dojo widgets.
 
 - [Pre-requisites](#pre-requisites)
 - [Usage](#usage)
@@ -38,16 +38,16 @@ Open the `dist` directory using a local webserver.
 
 ## Features
 
-This package demonstrates how to use Dojo 2 widgets as a custom element.
+This package demonstrates how to use Dojo widgets as a custom element.
 
 Notice `src/widgets/createMenuElement.ts` and `src/widgets/createMenuItemElement.ts` describe the custom elements.
-To build the custom elements, the `npm run build` command above first runs `dojo build` and then 
+To build the custom elements, the `npm run build` command above first runs `dojo build` and then
 
 ```shell
 dojo build --element=src/widgets/createMenuItemElement.ts
 dojo build --element=src/widgets/createMenuElement.ts
 ```
-Those CLI build commands use webpack to create bundles in the `dist` directory for each custom element.  
+Those CLI build commands use webpack to create bundles in the `dist` directory for each custom element.
 To use those custom elements in your own HTML page, import the custom elements' HTML files:
 
 ```html