[R6RS] Procedures that depend on Unicode character classification

[Anton van Straaten]

Michael Sperber wrote:
> I'd like to suggest that the procedures that depend on the Unicode
> character classification, i.e. the ...-ci... procedures, the
> {char,string}...case procedures, and `char-general-property' procedure
> be moved to a separate library.
> 
> They're by far not as frequently used as most of the others, and
> leaving them out of a program might save signficant space, as the
> tables they need to operate tend to weigh in roughly at the order of
> 100kbytes (depending on the compact representation chosen).

I've provisionally made this change to 
draft/corelib/library-contents.html in svn, by adding a 'unicode' 
library and moving these procedures there.

If Will's work on further compression of the necessary tables changes 
the desire for a separate library, let me know.

Anton