Version 9.0: A Small Lemon Tart

This version removes the whole 'safe code' concept, because frankly, I haven't found much use for a wrapping data pointer in brainfuck and I don't think anyone uses it either.

But apart from that, this release brings a complete rewrite of the compilation and translation backend, as well as more optimisations than were previously implemented. That's to say, about 15% more performance, and about 60% smaller executable sizes.