Lambda terms
Fixity declarations
Separate module for Pretty class
Fix semicolon stuff
Remove a bunch of unneeded constructor suffixes
Move parensIf and (>-) functions to Pretty module
Infix and prefix operators, and new precedence framework

Postfix ops don't work yet, because my Parsec-fu isn't strong enough.
Also, fixities aren't honoured in the printer because they're long
forgotten by then.