graphics/xpaint updated to latest version

Hello all,

xpaint has been updated to lastest version.
Try out new features!

I'm working on this update for more than 1 year but only yesterday I did
have the courage and nerves to build *all* releases until 3.1.4 as a way to
understand the best way to "hack" configures and Makefiles and stuff.

Please give it a try and tell me if anything needs to be fixed, etc.

Cheers!

https://cgit.freebsd.org/ports/commit/?id=973a707c70478448af77004a07eab1f85c2f6757

-- 
Nuno Teixeira
FreeBSD Committer (ports)