This works better with class interference.

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.

Since Coq 8.4 did not backtrack on eauto premises, we used to ensure
that hints like

  Hint Extern 0 (?x ≡{_}≡ ?y) => reflexivity.

were not used for goals involving evars by writing ?x ≡{_}≡ ?y instead
of _ ≡{_}≡ _.

This seems to be a legacy issue that no longer applies to Coq 8.5, so
I have removed these restrictions making these hints thus more powerful.

change statement of inv-open lemmas such that they do not force the invariant, and the 'inner step', to appear right next to each other

The rationale is that, just like the always lemmas about uPred and the frame-preserving updates for maps and iprdos, the versions with the ' are the "more specific" versions, hard-coding more assumptions in the shape of their conclusion.

Also do some minor clean up.

globalC -> globalF
New notation: iPropG, iFunctorG

Introduce the notion of "Frame Shift Assertions", and use to prove the rules about inv and auth at once for pvs and wp

Yeah, the name is horrible... but on the plus side, I think it should be possible to show that atomic triples and atomic shifts are also frame shift assertions, and then we get all this stuff for them for free.