#8 face colorization error

[Anonymous]

If a user specifies their local username in mixed case,
all messages are shown in tnt-other-face-name.

Fix is to change tnt-append-message to call
toc-normalize on tnt-current-user as well.

Line 844 of tnt.el
(if (string-equal (toc-normalize user)
(toc-normalize tnt-current-user))

instead of
(if (string-equal (toc-normalize user)
tnt-current-user)

Thanks for a great program!