* Did some casts cleaning up to reduce compiler warnings in tif_fax3.c,
from Bruce Carmeron <cameron@petris.com> -- modifications of
changes made by Frank (sun cc still complained on cast).
* Added tiffconf.h to install target per request from Bill
Radcliffe <billr@corbis.com>: "We need a way for ImageMagick to
know features have been compiled into the TIFF library in order to
handle things properly".
* Removed distinction between alpha and release targets in Makefile.in.
* added release.stamp target, which tags cvs tree, and updates
"RELEASE-DATE"
* added releasediff target, which diffs tree with source as of
date in "RELEASE-DATE"
* Ticked up version to 3.5.2 (alpha 01 -- but I think we'll moving
away from alpha/non-alpha distinctions).
* updated html to reflect release
