Adding rules for intptr casts + examples.

_CoqProject

examples/intptr.c

examples/proofs/intptr/dune

examples/proofs/intptr/generated_code.v

examples/proofs/intptr/generated_proof_int_ptr.v

examples/proofs/intptr/generated_proof_min_ptr_val.v

examples/proofs/intptr/generated_proof_roundtrip1.v

examples/proofs/intptr/generated_proof_roundtrip2.v

examples/proofs/intptr/generated_proof_roundtrip_and_read.v

examples/proofs/intptr/generated_spec.v

examples/proofs/intptr/proof_files

frontend/ail_to_coq.ml

frontend/coq_ast.ml

frontend/coq_pp.ml

include/refinedc.h

theories/lang/heap.v

theories/lang/lang.v

theories/lang/lifting.v

theories/lang/tactics.v

theories/typing/array.v