single char ids like f, p should be avoided;
renamed types as first, second, third etc

in a nice state now..
-- output file is selected and stored globally rather than being
   passed around all the time;
-- implicit NULL tests are now explicit;
-- some details of the generated code are different now.

added prototype rebuild stuff in a comment (for cutting and pasting);
added decln, param and shape.

TRUE if we're optimizing (temporary code) or FALSE otherwise

in generated code

required a few changes to impln_declns

removed print/write option - always written;
opt = TRUE by default; added -n "no optimize" option..

JustLikeThis :-)

all typenames now capitalized;
this ties in with the change to m2decs.c that replaced
things like {type}_is_{shape} with {type}Is{shape} -
so it looks better if type and shape names are capitalized

renamed GetKind{Type} -> {Type}Kind;
called the enumated type KindOf{Type};
had to use various nasty VAL/ORD gubbins to make it all work

also moved verbose and opt into optimize.[ch]

grammar revised, EXPORT and GLOBAL sections added,
types surrounded by TYPE { .. } brackets
caused changes to upper parse procs

moved MUSTBE up above first proc;
lined up an '=' somewhere..

put casts on all uses of NULL to shut lint up;
expected->error, removed "expected" word from default message,
so all calls to expected (and the macro MUSTBE) have expected
added

updated this to reflect that

changed idtree type (leaf now has string and intlist..)

and added readnextline for export and global reading..

also ungettok() was still called pushbacktok() in the prototypes