[XeTeX] New feature planned for xetex

[Akira Kakuto]

> Currently, this feature is implemented only in the "contextual-space" 
> branch of the code at sourceforge; anyone interested in testing it will 
> need to check out and build the code from there.

I have tried to build a binary for win32:

http://members2.jcom.home.ne.jp/wt1357ak/xetex-ctx-spc.zip

I don't yet test myself.
I'll remove this file in due time.

Best,
Akira