Bindings for the name attribute of controls

I find it useful to be able to set the name attribute of the control elements, for example to find the controls within integration tests. Standard ember input helper allow this, see http://emberjs.com/guides/templates/input-helpers/, but not ember-forms. Added the name property of the controls as a computed property, defaults to propertyName, so you have some reasonable defaults.

Hope this might be helpful to others!

Greetings,
Simon