Run all dhall-lang tests for normalization

Pass all import tests

Allow self-describing CBOR

Allow imports to be either binary or source form

Update to latest dhall-lang

Add cache_key test runner

Anything we'll eventually run is a skip

Fix test to new binary format

No more null fragment

Use upstreamed type tests

Working parser

Simplify binary tests for now

Fix style in tests

Forgot to add this file

Refactor Optional/None typecheck

Refactor Function annotate

Run tests per docs

Use path like names in more tests

Implement integrity checks

Working typechecker

Type inference/checking about half done

Passing unit tests for features implemented so far