Added a new lemma to allocate fragmented ownership in unital gmaps while…

See merge request FP/iris-coq!164

Added a new lemma to allocate fragmented ownership in unital gmaps while updating the full ownership

Logically atomic triples: Notation, tactics, small example

See merge request FP/iris-coq!163

make atomic_acc typeclasses-opaque

Use telescopes for atomic accessors, updates and triples; improve mask handling; add notation for all of them

Generalized proofmode

Closes #91, #198, #193, #190, #187, #182, #156, #177, #176, #147, #146, and #154

See merge request FP/iris-coq!66