spec - specification for the Crowbar C replacement

Age	Commit message (Expand)	Author	Lines
2020-10-31	explain tagged unions	Melody Horn	-3/+9
2020-10-31	settle on a tagged union plan (for now)	Melody Horn	-4/+52
2020-10-31	define and annotate some language elements	Melody Horn	-21/+56
2020-10-29	finish moving tokens to new format	Melody Horn	-10/+81
2020-10-29	start to elaborate on syntax	Melody Horn	-0/+74