Add aurelia.io integration instead of Angular

[amitaibu]

We will need to decide if we'll keep the client side as part of hedley itself or split to generator-hedley-angualr1 and generator-hedley-aurelia

WIP here

[amitaibu]

fyi @bricel @nader77 @ordavidil @ceoaliongroo

[ceoaliongroo]

This is the official generator aurelia, https://github.com/zewa666/generator-aurelia, maybe, it's helpful as a reference.