hy/TODO

 - Tree mangle routines
   + (fn []) displacement to top of relevent scope, replace with
     nameref.

   + Manage imports on the fly (for stuff like literal HyExpressions) or
     a (-> read eval print loop)

   + Use (def) to imply global foo

  - New Builtins:
   + While

  - New macros:
   + loop

  - nREPL type thing:
   + SocketIO endpoint
   + Socket endpoint
   + hyde (hy-dee-e - thanks arno)

  - Builtin type checking (@params(HyExpression, HyList, HyExpression))

  - Better Exception handling
   + linenos in the dump
   + except IOError as E: # <-- implement

  - Tuples

  - List / Dict comprehensions

  - var-arity [x y & z]

  - car / cdr / first / rest

  - hyrepl

  - pyc compiler