Merge branch 'master' of https://gitlab.mpi-sws.org/FP/LambdaRust-coq

theories/typing/cont.v

theories/typing/examples/get_x.v

theories/typing/examples/init_prod.v

theories/typing/examples/lazy_lft.v

theories/typing/examples/rebor.v

theories/typing/examples/unbox.v

theories/typing/lft_contexts.v

theories/typing/lib/cell.v

theories/typing/lib/fake_shared_box.v

theories/typing/lib/option.v

theories/typing/lib/rc.v

theories/typing/lib/refcell/ref_code.v

theories/typing/lib/refcell/refcell_code.v

theories/typing/lib/refcell/refmut_code.v

theories/typing/lib/rwlock/rwlock_code.v

theories/typing/lib/rwlock/rwlockreadguard_code.v

theories/typing/lib/rwlock/rwlockwriteguard_code.v

theories/typing/lib/spawn.v