[Rd] MikTeX will be assumed in R 2.2.0 in Windows

[Duncan Murdoch]

I've just committed some changes to allow R to be built and to use 
MikTeX without needing the Rd.sty files to be installed to localtexmf. 
Unfortunately, the changes are not compatible with other TeX packages, 
so if you're not using MikTeX you'll need to edit a couple of the config 
files (or set an environment variable).

I'd appreciate hearing of any problems during the alpha or beta test period.

A binary build containing the changes should be on CRAN tomorrow or the 
next day.  Look for revision 35546 or higher.

Duncan Murdoch