Slate AST unparser

[Lendvai Attila]

hi!

I'm planning to work on an AST unparser, and after that some macros that
analyze slate code (is it recursively side-effect-free?, collect all
object it depends on, etc).

Where should I put the AST print methods? I prefer
mobius/syntax/syntax.slate (locality of stuff), but could be
lib/print.slate, too.

Any suggestions on what protocol to use? I'm planning to reuse the
current print protocol, but there could be pitfalls.

- 101