some major improvements. changed to getopt() for flag processing, added -s FUNC suppression set functionality so that you can suppress the automatically generated print_TYPE function (because you've written your own tweaked version)..

split meta-data generation out, separate -m mode generating meta-data to stdout, no .dd file, much nicely

datadec-1.3: converted the code (and the code generated) to use stdbool.h throughout, and added code into decs.c to generate a .basename.dd file listing the types, the shapes, and the parameter types per shape.

tested experimental free support (added "-" dontfree hints in cdata.in, and tackled pointer sharing problems in ctest.c)

first stage of adding free/dontfree support to datadec: added token '-' (to the lexer), made optional in a parameter declaration (in the parser), made a place to store "BOOL dontfree" (in the struct module) and rules in the parser to glue it together.  also added an array of predefined types-that-are-never-freed and used that (as well as the "-") to set dontfree.

bugfix: was applying length(intlist) to length(illist) - and by a miracle of structural equivalence it was working:-)  ansi prototypes stopped this, so now two length() functions..

in the wrong place - failed to check properly!