[TUHS] Ratfor revived!

Hi All. Mainly for fun (sic), I decided to revive the Ratfor (Rational Fortran) preprocessor. Please see: https://github.com/arnoldrobbins/ratfor I started with the V6 code, then added the V7, V8 and V10 versions on top of it. Each one has its own branch so that you can look at the original code, if you wish. The man page and the paper from the V7 manual are also included. Starting with the Tenth Edition version, I set about to modernize the code and get it to compile and run on a modern-day system. (ANSI style declarations and function headers, modern include files, use of getopt, and most importantly, correct use of Yacc yyval and yylval variables.) You will need Berkely Yacc installed as byacc in order to build it. I have only touch-tested it, but so far it seems OK. 'make' runs in like 2 seconds, really quick. On my Ubuntu Linux systems, it compiles with no warnings. I hope to eventually add a test suite also, if I can steal some time. Before anyone asks, no, I don't think anybody today has any real use for it. This was simply "for fun", and because Ratfor has a soft spot in my heart. "Software Tools" was, for me, the most influential programming book that I ever read. I don't think there's a better book to convey the "zen" of Unix. Thanks, Arnold