This project is tested to work in Linux, and a Makefile is included.

One note when you try to compile in optimized mode.  There's a problem
that I think might be a bug in gcc, I don't know.  But there are
linking errors.  The solution is:

1. compile the image.cpp class without -O2
2. Type make.

This should work.  Also compiling the whole project unoptimized, or in
debug mode, works too.  If anyone fixes this problem, email me.