Hi Guilers,

Happy new year!

Find attached a patch that adds C and Scheme support for the four
Unicode string normalization forms [0], along with documentation and
unit tests.  The API matches the one described in R6RS Standard
Libraries 1.2 [1].  Questions?  Comments?


Regards,
Julian

[0] - http://www.unicode.org/reports/tr15/tr15-31.html
[1] - http://www.r6rs.org/final/html/r6rs-lib/r6rs-lib-Z-H-1.html#node_toc_node_sec_1.2