* Getting closer to having ADT defs

* ADT defs working probly

* Match parsing basipally done

* came to earth in a silver chrome UFO

* match finished?

* All tests but newest are passing

* ADT constructors work

now cleanup?

* Cleanup round 1

* Cleanup round 2

* Cleanup round 3

* Cleanup round 4

* Cleanup round 6

* Cleanup round 7

* Lil grammar fix

* Remove ANTLR Java files

* Lint roller

* Lint roller

* Address feedback

* Test completeness in match test

* Remove unused imports

* Lint roller

* Switch to Rust-style ADT syntax

* Lil fix

* Add dummy `extern type` handler

* Add type arg to test

* Update prelude semantic version

* Repair test

* Fix graph var handling in match

* Revert 's/graph_equal/is_unifiable' change