Update to Unicode v7.0.0 data

Closes #57 and #73.

TODO for after this is merged: https://github.com/slevithan/xregexp/pull/57#issuecomment-53625800
Thank you for checking. As you noted, this comment is inappropriate here. It does not need to be restored here or elsewhere.

The reason for the comment (not explicit) was that `[]` does not work as expected in IE 8 and lower. But encountering this is super unlikely, both because of the decreasing share of browsers where this is a problem, and because use of inverted Any within a character class that contains no other characters is very very unlikely (the property itself has to be inverted, rather than inverting the character class with `[^...]`, and since there are no other characters in the brackets there is no need to use the brackets in the first place).