Event namespaces

Each plugin should bind their events with their own namespaces. This is useful, especially during updating and unbinding plugin events.

Here are sample events our [Clear](https://github.com/uxrocket/uxrocket.clear/blob/master/lib/uxrocket.clear.js#L21) plugin

```
keyup: 'keyup.uxClear',
focus: 'focus.uxClear',
input: 'input.uxClear',
click: 'click.uxClear'
```
