Merge pull request #1 from fragglet/master

Fix inappropriate varargs in fixed arg function.
Add AUTHORS and COPYING files
Support for deflate compression in zip writer.

Also enabled unit test function for temporary debugging.
Date was still different than desired.
Don't load level PWADs into directories

Since targeting .zip format as output, levels will be in their own WAD
inside the zip.
Doc and unit test changes

* Use NO_UNIT_TESTS to disable all unit test code
* Documentation and slight changes in zip writer
Sound effects support

Added s_sfxgen module to read LCDs for sound effects and output in DMX
format.
Move inttypes/stdint for Visual C++ to subdir
Add Makefile for compilation outside Windows.

With this change, psxwadgen now compiles and runs on Linux (but has not
yet been fully tested). Some minor changes are also included for
portability.