[cvsnt] Latest updates

[Tony Hoyle]

cvsnt 2.0.3

Fix crash when checking out a single file from a heirarchy and putting it into
a single directory (it sounds obscure but needs fixing anyway).
Minor cosmetic stuff.
cvsgui protocol update.

cvsnt 2.1.1

Sync up to 2.0.3
Checkout symbolic branch revisions.  eg. 'foo.10' is the 10th revision in
branch 'foo'. (Eventually I'd like this to be the default way of accessing
files, but it'll play havoc with the frontends so I'm taking it slowly).

Tony