upgrade ember-cli-qunit and remove qunit divs

The latest ember-cli-qunit injects these in the contentFor('test-body') so they are not necessary any more.
refs https://github.com/jakecraige/ember-cli-qunit/pull/18
Feature: Allow testem to run specific test module

Adds `--module` command line option to `ember test` and `ember test
--server`. The `--module` option tells QUnit to run the specified test
module.

Example usage `ember test --module "Module Name Here"`
replace 'proxy-middleware' with 'http-proxy' to support websocket on proxy-server task.
Enhancement: `ember test` can accept both `--module` and `--filter`

This allows testing a specific module for all tests containing a given
string.

Example usage all tests in the `fooModule` containing the word `bar`
`ember test --module "fooModule" --filter "bar"`
Remove hardcoded `index.html` value

This allows the generated html file to be renamed however is needed.

This is exceptionally helpful for configuring how the root HTML file
should be cached, since the `index.html` is cached harshly by most web
servers

To use it, configure `outputPaths.app.html` in your `Brocfile.js` file:

    var EmberApp = require('ember-cli/lib/broccoli/ember-app');

    var app = new EmberApp({
      outputPaths: {
        app: {
          html: 'custom-name.html'
        },
      }
    });

    module.exports = app.toTree();
Add changelog to reflect 020feb9
Merge pull request #2523 from mynewsdesk/remove-hardcoded-index-html

Remove hardcoded `index.html` value
Merge pull request #2531 from jakecraige/qunit-upgrade

upgrade ember-cli-qunit and remove qunit divs
Merge pull request #2510 from xiujunma/master

Add "ws: true" to create http proxy server option to support proxying websockets.
Refactor: better organized code to build up query string
Move morgan login to server index.
Merge pull request #2532 from JarrodCTaylor/master

Feature: Allow testem to run specific test module
Include morgan with http-mock.
Merge pull request #2518 from abuiles/move-morgan-to-index-js

Move morgan login to server index.
ensure that .jshintrc is added when generating addons
Merge pull request #2206 from csantero/addon-blueprint-jshintrc

add .jshintrc files to addon blueprint
Updates broccoli-asset-rev to 1.0.0
Merge pull request #2535 from rickharrison/asset-rev-update

Updates broccoli-asset-rev to 1.0.0
Fix robotstxt.org url

Looks like http://robotstxt.org does not resolve without www.
Remove unnecessary .gitkeeps

Given that there are files already present in these directories the `.gitkeep`s are unnecessary.