Strengthen validy of fragment of view camera

See merge request iris/iris!546

remove algebra/ dependency on base_logic/

Closes #355

See merge request iris/iris!549

Thanks @Blaisorblade for reporting.

avoid relying on implicit instance generalization

See merge request iris/iris!545

clarify the intended use of gen_heap, and rename gen_heap_ctx -> gen_heap_interp

See merge request iris/iris!542

add counterexample for uPred CMRA extension axiom

See merge request iris/iris!539

gmap_view: add deletion lemma

See merge request iris/iris!541

Make `solve_inG` faster.

See merge request iris/iris!532

1.) First `simpl` away all the functors 2.) Don't use `done`, which calls `split`.

add a general gmap_view library and use it for wsat, gen_heap, proph_map

Closes #328

See merge request iris/iris!486

fix combining two q/2 fractions to a q

See merge request iris/iris!540

generalize dfrac IsOp instance

See merge request iris/iris!537

prove a funny consequence of Löb induction

See merge request iris/iris!538