Add introduction pattern `-# pat` to move a hypothesis to the spatial context

Closes #213

See merge request iris/iris!370

It was already marked as deprecated in `doc/proof_mode.md`.

- Rename `IPureElim` -> `iPure`, `IAlwaysElim` -> `IIntuitionistic`
- Drop `IAlwaysIntro` (it's just `IModalIntro`).

Remove useless implicit annotation on binder

See merge request iris/iris!376

Tej Chajed authored 5 years ago and Ralf Jung committed 5 years ago

Fixes a new warning on Coq 8.12+alpha when implicit annotations are used
in positions where they are ignored.

Adding a constructor for reflexive transitive closures into bi's

See merge request iris/iris!375

rename _open rules to _access if they are actually accessors

See merge request iris/iris!373

Add twp_ lemmas for the arrays.

See merge request iris/iris!374

Fix issue #288: iExists fails if goal after the existential quantifier is an evar

Closes #288

See merge request iris/iris!372