to build *all* tables in makeunicodedata.py.

ranges) -- but thanks to the 2.0 compression scheme, this doesn't add
a single byte to the resulting binaries (!)

Closes bug #117524

augmented print statement instead.

- added decimal digit and digit properties to the unidb tables

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

- also mention the unicode directory in Tools/README

- fixed attributions
- moved decomposition data to a separate table, in preparation
  for step 3 (which won't happen before 2.0 final, promise!)
- use relative paths in the generator script

I have a lot more stuff in the works for 2.1, but let's leave
that for another day...

a bit, sped it a lot primarily by removing the unused assumption that None was
a legit bin entry (the function doesn't really need to assume that there's
anything special about 0), added an optional "trace" argument, and in __debug__
mode added exhaustive verification that the decomposition is both correct and
doesn't overstep any array bounds (which wasn't obvious to me from staring at the
generated C code -- now I feel safe!).  Did not commit a new unicodedata_db.h, as
the one produced by this version is identical to the one already checked in.

- use unidb compression for the unicodedata module.  on Windows,
  the new unidatabase module is 120k, down from nearly 600k.