See https://gitlab.vulnix.sh/spacecadet/suix-lib

add spur? flag to get-spur, returns path to checkout instead of spur
for combatibility, and building compatibility code

export get-spur accessors

initial building blocks of some kind of sandbox module to evaluate "pure" spurs in

comes with an annoying warning

overlays are now passed sets directly instead of inside a thunk, requires refactoring for all collection overlays

Revert "guile module modification, bunk commit, adding these so I can remove them to have them in git history"

This reverts commit b8064fc8.

guile module modification, bunk commit, adding these so I can remove them to have them in git history