play well with morphable

[lukeburns]

this was made to be used with morphable, but running into some issues with wrapping proxies in proxies.

immutator should wrap morphable (an observable), but morphable internally uses raw to render the initial element that is morphed on state changes. this allows elements to be composed without parent elements reacting to state changes that only child elements depend on.

however, using raw also means that the raw object is vulnerable to mutation within this initial render — also in onload and onunload, where it's probably even more tempting to mutate directly.

i wonder if an ignore function can be introduced into observer-util that would allow me to avoid exposing the raw object.