Zudipropsc is now a fully qualified program with several operational modes
and a more pleasant (though more complex) command-line interface.

* Isolated the ZUDI Index layout types into their own header.
* Updated the makefile.
* Prototypes for the parser functions.
* Separated all command-line parsing into its own function.
* Added support for \r\n (NT-styled) EOL sequences in TEXT parsing mode.