initiate main--doesn't do much yet
started using makefile, renamed the executable to magee

Magee, vaguely after the fictional detective Travis McGee,
tentatively, acronym for Multi-purpose Animated Graphical
Engineering Emulator.
added first test file
learning how to use github
first commit of a working magee executable
cloned some documentation busywork from main.c to treewalk.c
Merge branch 'master' of https://github.com/d-harvey2/magee