spec - specification for the Crowbar C replacement

Age	Commit message (Expand)	Author	Lines
2020-10-25	add fragile keyword	Melody Horn	-0/+4
2020-10-21	don't compile to C after all	Melody Horn	-3/+4
2020-10-20	add detail on C VLAs	Melody Horn	-1/+5
2020-10-20	add more details	Melody Horn	-1/+23
2020-10-19	super rough draft of memory safety	Melody Horn	-0/+61