standalone core parser

[Kirsten Chevalier]

> What about the Core interpreter in fptools/ghc/utils/ext-core ?
> 
> There's a Happy parser source file there, Parser.y, as well as
> all sorts of other Core-related goodies.

FYI, one can use the parser and printer in fptools/ghc/utils/ext-core as
is, but the typechecker and interpreter need updating in order to work
with Core emitted by the latest version of GHC (the changes should be
pretty minor, but I haven't tried to make them). 

-- 
Kirsten Chevalier * krc@uclink.berkeley.edu * Often in error, never in doubt