Inductive (or recursive) data type generator for C
- to build: 'make'
- to install into your TOOLDIR:	'make install'
- then 'man datadec' will show you the man page.
- 'rehash' and 'which datadec' will show you
  datadec is found in your tooldir.
- there's an example of how to use it in the man page.
