[wdiff-bugs] Color mode

[Victor Engmark]

Based on standard instructions for using color codes in the shell, how 
about using this method for more portable color coding:

wdiff -w "$(tput bold;tput setaf 1)" -x "$(tput sgr0)" -y "$(tput 
bold;tput setaf 2)" -z "$(tput sgr0)" "$@"

It would also be very nice if this could be built into wdiff as a new 
option, like `git diff --color=[auto|always|never]` does to very good 
effect.

Cheers,
V