seems to work for addition
normalized file endings
no, this is NOT working for factorial
working for factorial, via compile-and-go testing. check vs sols?
perused solutions
refactored driver, and now i think recursion is quite natural
Exercise 5.38 - open-coded primitives (hard-coding basic arithmetic operations as uber-primtive at compile-time, instead of doing a compound/primitive test at runtime)
deleted development notes/dead ends