Implementation of BASIC interpreter in Rust. The implementation follows the ECMA-55 specification.

This project is WIP:

1. Pick any tests marked with try_test_program in tests/integration.rs.
2. Change the test to use the test_program macro.
3. Run cargo test PXXX where XXX is one of the tests you want to fix.
4. Read the ECMA-55 spec. 😀
5. Implement parsing in src/parser.rs.
6. Implement interpreter in src/interpreter.rs.
7. If needed, extend model in src/ast.rs.
8. Run cargo test to see if you made any other tests pass!
9. Profit!