#15 haskell-like whitespace scoping

[Erick Tryzelaar]

This is a very low priority request. I believe haskell allows you to
optionally scope code with whitespace like python instead of using blocks
like {}. Something like this could be very handy to treating felix as a
scripting language. However, it'd probably require some substantial
changes to the lexer/parser in order to get it to work.

-e