Adding a specification document to help steer the project.
treedf1a9a260468cca8a70a9f40656d1443ff23fb4c
-rw-r--r-- 57 .gitignore
-rw-r--r-- 1403 basics.h
-rw-r--r-- 851 numbers.h
-rw-r--r-- 349 sigutils.c
-rw-r--r-- 1100 spec.org