Get default data

[undoZen]

Just picked up from where @SimonDegraeve left on #46 . Fix bug and add tests.
Also, add two test cases for stores listen to other stores.

[SimonDegraeve]

Nice job. I have been buzy looking deeper into yahoo's dispatchr, fetchr and routr and like you said in this comment the dehydrate/rehydrate feature is quiet awesome.

Appreciate you fix this PR.

[SimonDegraeve]

Also it would be nice to handle the defaultCallback in createStore and ListenerMixin in a same module (see explanations)

[undoZen]

All done. @spoike please review and merge it.

[spoike]

This needs to be documented in the README.md. I'll try to merge this in the evening after work (around 19:00Z+02:00), to make the 0.1.7 release. Feel free to add a blurb about it if @undoZen or @SimonDegraeve has time to do so. :-)

[spoike]

Four test cases in testling fail with the following error message:

TypeError: 'undefined' is not a function (evaluating 'defaultCallback.bind(listener)')

They fail because the solution is using Function.prototype.bind which is not available on all browsers.

[spoike]

I've changed it for the 0.1.7 merge to use Function.prototype.apply and Function.prototype.call instead.