Make test/parser.empty-program 0 child statements test pass.
Change project name in readme file.
Add link to COPYING in readme file.
Refactor: Replace 'statements' with 'expressions.'

Chii won't have statements, only expressions.
Make test/parser.empty-program pass.
Add test/parser.empty-program code block test.
Make test/parser.empty-program code block test pass.
Update test/parser.empty-program 0 child expressions test.
Make updated test/parser.empty-program 0 child expressions test pass.