Enfocus: Breaking Change (view binding)

[ckirkendall]

I just committed a breaking change for view bindings.  In the past when doing a complex mappings between the view object and your state object you used options :mapping, :to-obj and :from-obj.   These options have been replaced by the :lens option.  Lenses are Fresnel lenses.  Fresnel is a library that allows you to create and compose lenses in the same way we compose a lens into clojure maps using a vector of keywords.    

Updated Documentation: http://ckirkendall.github.io/enfocus-site/#view-binding

Fresnel Library: https://github.com/ckirkendall/fresnel

Creighton