add license crap

LICENSE

theories/base_logic/gen_heap_bij.v

theories/base_logic/gen_sim_heap.v

theories/logic/fixpoints.v

theories/stacked_borrows/bor_semantics.v

theories/stacked_borrows/defs.v

theories/stacked_borrows/examples/opt1.v

theories/stacked_borrows/examples/opt1_down.v

theories/stacked_borrows/examples/opt2.v

theories/stacked_borrows/examples/opt2_down.v

theories/stacked_borrows/examples/opt3.v

theories/stacked_borrows/examples/opt3_down.v

theories/stacked_borrows/expr_semantics.v

theories/stacked_borrows/helpers.v

theories/stacked_borrows/lang.v

theories/stacked_borrows/lang_base.v

theories/stacked_borrows/locations.v

theories/stacked_borrows/notation.v

theories/stacked_borrows/steps_access.v

theories/stacked_borrows/steps_foreach.v