bin/mdw-{editor,pager}: Recognize other Emacs terminal types.

bin/mdw-{editor,pager}: Recognize other Emacs terminal types.

The `emacs' type is there precisely because it isn't `dumb', which will
make `git' apply colouring.  But I think that `M-x ansi-term' is actually
better so I doubt that this will get much use.

It's important to recognize the `term' and `ansi-term' terminals because
trying to start `emacsclient -nw' in them makes Emacs deadlock.  Besides,
plain `emacsclient' is almost certainly more convenient.