Unicode 9.0 tests

I have committed a bunch of Unicode 9.0 tests (there were none). I think it makes sense to retrospectively apply them for 6.0, 7.0 and/or 8.0. Since they are in part generated from the official Unicode docs, I think that can be done without too much pain (we support 9.0, and some characters have been reassigned new categories, hence we fail some of the existing tests of 6.0 or even 3.2). 

 

This also suggests that the Unicode version is not a forward compatible version. If you support 8.0, you may fail tests in 6.0. Which is odd, but unfortunately the way it is. 

 

Cheers,

Abel