Rebol3 tests

Here are my completed Rebol 3 tests.

Not surprising Rebol 3 doesn't do to well without Normalisation, grapheme cluster handling and strings not correctly recognising characters above the BMP :(

You can use binary! to get test 9 to pass (see alt-tests-using-binary.reb).  Using binary! more can help on some of the other tests (with a bit more work).  However its important to see what issues Rebol 3 has with Unicode strings so kept separate from main tests (unicode-tests.reb).