observable data vs URL miss-match

[justinbmeyer]

Say on an empty hash (`window.location.hash = ""), the following runs:

var state = new DefineMap({count: 0});
route.data = state;
route.start()

What should the hash and state.count be after? Currently, on start we `assign(route.data, deparam(url) ). This leaves:

hash            //-> ""
state.count //->0

I think this is wrong. Either it should be:

hash            //-> ""
state.count //-> undefined

hash            //-> "#!count=0"
state.count //-> 0

[justinbmeyer]

This issue: canjs/canjs#979 is the source of some of this weirdness. It lends itself to making the hash:

hash            //-> "#!count=0"
state.count //-> 0

I will make this this happens.