remove node 0.10.26, which seems to constanty fail on travis
EmberAddon

Will call the EmberApp constructor with defaults for addon projects. In
the addons Brocfile only the following is required:

```js
var EmberAddon = require('ember-cli/lib/broccoli/ember-addon');
var addon = new EmberAddon();
module.exports = addon.toTree();
```
Add verbose option to version command
Add test for version command.