[import version 1.45, retrieved from http://www.wyatt100.freeserve.co.uk/ and dated 2000-07-10
dankna@gmail.com**20080219190905] 
[fix line endings to unix-style in glpng.c
dankna@gmail.com**20080219191845] 
[fixed the header path to gl.h to work on a Mac
dankna@gmail.com**20080219192047] 
[fixed Apple header includes; added a call to glutInit() which apparently isn't requires on Windows, contrary to the spec
dankna@gmail.com**20080219192705] 
[added a makefile for the test program
dankna@gmail.com**20080219193510] 
[added a Makefile for the main library on the Mac (doesn't handle installation properly)
dankna@gmail.com**20080219193607] 
[oops - I was including the GLUT framework in the libglpng.a, which is unnecessary since it doesn't use it.  doesn't hurt anything either, but this change removes it...
dankna@gmail.com**20080219201533]