Toggle components not fully upgraded for ripple effect

When switches, radio buttons and checkboxes are upgraded using the `componentHandler`, the internal `__ripple-container` is not upgraded and the ripple is not effected when the toggle is clicked. There is a copdepen [here](http://codepen.io/cartant/pen/XmYqLd) that puts statically-created and dynamically-created toggles side by side.

With the statically-created switch, the `mdl-switch__ripple-container` looks like this:

``

And with the dynamically-created switch, like this:

``

The dynamically-created switch's `label` contains this attribute:

`data-upgraded=",MaterialSwitch,MaterialRipple"`

suggesting that the switch component has been upgraded for the ripple effect, but without the internal `mdl-switch__ripple-container` being upgraded, too, there'll be no ripple effect.

Note that explicitly upgrading the `mdl-switch__ripple-container` using the `componentHandler` results in the expected behaviour, but that should not be necessary: the `componentHandler` should fully upgrade the component.