Implement directions (only W,E+B so far) with d and c commands
Implement directions (only W,E+B so far) with d and c commands

There are still some edge cases that don't work properly (try dE from
the start of 'hi there'), but I'm planning to re-implement W,E & B with
regexps which I'll need for w,e & b anyway, so I'm not worried.

Signed-off-by: Ian Munsie <ce389fd2fa887d610219cb85dea6dc9451973e74@gmail.com>

DarkStarSword/junk,DarkStarSword/junk,DarkStarSword/junk,DarkStarSword/junk,DarkStarSword/junk