Renamed module SCION to scion (lowercase).
Interpreter starting to work .First basic test works.
Created new naming convention for tests. Generalized the test harness. Decided not to use other existing unit testing frameworks. May revise this later.
Got initial parallel states to pass.
Created a script to automatically port over tests from SCION. Ported over parallel+interrupt/*. All tests pass.
Ported over more tests. All tests pass.
Added tests and support for history state. Works great, except for history6, which includes exprs, which we don't handle yet.