Make the cmd-line args match cowsay's usage

[tmck-code]

Context

I looked for the -n options to disable line wrapping and found that it wasn't in pokemonsay. I find it useful so that quotes/poems etc. don't have weird line wrapping that makes them a little awkward to read.

Changes

• changed settings wrapping width with -W instead of -w.
• implemented missing arg -n to disable line wrapping
• Changed existing -n to -N to avoid conflict

Caveats

This does break the existing usage of -n ("don't print pokémon name) and -w (line-wrap width), but I decided that trying to match the existing cowsay args first might be a good approach.'

I'm happy to keep the existing args if that is more desirable 👍 .

[joezhouchenye]

Just use the cow files instead of pokemonsay. cowsay -n -f <file> message will work.