version number to 0.51-0

touch up msw 64 bit build script and delete "wxp 64" script - windows

XP doesn't seem to run 64 bit apps.  (Perhaps XP "professional" does but
no way to test that).  The next version along is Vista which reportedly
supports IPV6 and therefore can run the new "msw-64" compile target.

script changes for windows compilation to allow IPV6 handling. There's

a new windows release terget for 64-bit XP (with no IPV6).  The regular
version is now 64-bit and requires at least Windows Vista for the IPV6
support.

version number to 0.50-2

release notes for 0.50-1

update to release crib notes

improved file naming in 64-bit MSW release script

version number to 0.49-1. There aren't any changes to the source code…

…; this

is to set the numbering for a bugfix release for Mac (0.49-0 came with a bad
Tcl/Tk version).  Will release a fixed "version 0.49-1" for Mac only and leave
the other targets at 0.49-0.

version number to 0.49-0

version # to 0.49-0test5