stch.schema a Prismatic Schema fork

[da...@dsargeant.com]

Please check out the repo README page for motivations and differences.  Thanks so much to the Prismatic people for open sourcing Schema.  It's awesome and I love it.  Some of my changes seemed too different to even consider a pull request, so I decided to create my own fork.  All feedback is welcome.

https://github.com/stch-library/schema

[Leif]

 fn* and letfn* are special forms.  I would double-check that things work as you expect if you (use 'stch.schema).
E.g.:

> (use 'stch.schema)
> (macroexpand '(fn* simple-fn :- Int [x :- Int] (inc x)))
; => (fn* simple-fn :- Int [x :- Int] (inc x)) ; nope, can't expand special form
> (macroexpand '(stch.schema/fn* simple-fn :- Int [x :- Int] (inc x)))
; => (let* [ufv__ stch.schema.util/use-fn-validation ...) ; works

--Leif

[da...@dsargeant.com]

Thanks for pointing that out.  Changed defn*, defrecord*, fn*, letfn* to defn', defrecord', fn', and letfn'.  Added tests for fn' and letfn'.