[arch-dev-public] Welcoming Dave Reisner to the dev staff

Please welcome Dave to our development team. He has been a frequent contributor (and reviewer of patches!) to Pacman, has been a TU for a little bit, and has taken initiative on a lot of initscripts/mkinitcpio/systemd type stuff. I think I've given him all the right permissions and such, and signed him up for the relevant mailing lists. -Dan