After the New Year copyright-dates fiasco, I think it's about time

After the New Year copyright-dates fiasco, I think it's about time
we had one or two official checklists. This file lists the locations
of _all_ the copies of the licence and the copyright dates, all the
files in CVS which need to know the current version number, and also
lays out the release procedure since I always find it terribly
fiddly to do it all in the right order.
PLEASE KEEP THESE LISTS UP TO DATE, people! Anyone adds a new copy
of the licence or the copyright notice, shout about it in here.
Likewise any file that needs to know the current release number and
can't get away with referencing LATEST.VER.

git-svn-id: svn://svn.tartarus.org/sgt/putty@2589 cda61777-01e9-0310-a592-d414129be87e