dfn/< operator should behave like Clojure's < operator

[cnuernber]

Currently providing more arguments than 2 to dfn/< results in an error. This is in general a useful paradigm in clojure, however, as you can type:

(< 0 x 15)

And get back a boolean that indicates of x is between 0 and 15, exclusive. This would logically extend to <,<=,>, >=. In those cases there is an implicit and of the resulting operations taken in order, so (< 0 x) && (< x 15) in the example above.