start the heap construction: load from a heap is done... store, CAS, and singleton (mapsto) to be done

On branch master
	modified:   algebra/fin_maps.v
Untracked files:
	heap_lang/heap.v
no changes added to commit (use "git add" and/or "git commit -a")

Also, do some cleanup, like declaring Params instances.

(missed practically everything in the previous commit)

Also, make our redefinition of done more robust under different
orders of Importing modules.