New in 0.9.1:
* In the include file unicase.h, functions for case mapping of substrings have
  been added.

New in 0.9:
* The new include file unicase.h implements case folding.
* The new include file uninorm.h implements normalization.
* The new include file uniwbrk.h implements word break determination.
* The library source code is now part of gnulib.