Tidy up the model, add rules for external lp proofs

_CoqProject

theories/examples/or.v

theories/examples/par.v

theories/examples/various.v

theories/experimental/helping/helping_stack.v

theories/logic/adequacy.v

theories/logic/compatibility.v

theories/logic/derived.v

theories/logic/model.v

theories/logic/proofmode/spec_tactics.v

theories/logic/proofmode/tactics.v

theories/logic/rules.v

theories/logic/spec_rules.v

theories/tests/proofmode_tests.v

theories/tests/tp_tests.v

theories/typing/fundamental.v

theories/typing/soundness.v