type lookups: whitespace and linebreak.

These lookup tables are from the Python 1.6 version with the addition
of the 205F code point which was added as whitespace code point to Unicode
since then.

unicodedata.east_asian_width().  You can still implement your own
simple width() function using it like this:
    def width(u):
        w = 0
        for c in unicodedata.normalize('NFC', u):
            cwidth = unicodedata.east_asian_width(c)
            if cwidth in ('W', 'F'): w += 2
            else: w += 1
        return w

iswide() for east asian width manipulation. (Inspired by David
Goodger, Reviewed by Martin v. Loewis)
- Move _PyUnicode_TypeRecord.flags to the end of the struct so that
no padding is added for UCS-4 builds. (Suggested by Martin v. Loewis)

predicates

tests.

Implement sys.maxunicode.
Explicitly wrap around upper/lower computations for wide Py_UNICODE.
When decoding large characters with UTF-8, represent expected test
results using the \U notation.

sizeof(int)

- use unidb compression for the unicodectype module.  smaller, faster,
  and slightly more portable...

huge switch statement broken up. This will probably not be necessary when
the Win64 compiler matures.

This is a notice without a date, which apparently is not a claim to
copyright but only advice to the reader.  IANAL. :-)

into 1000-case smaller ones.

i.e the ones with category 'Ll','Lu','Lt','Lo','Lm'.

Added a few missing whitespace Unicode char mappings.
Thanks to Brian Hooper.