* Move DB code in pkgsubmit.php to new functions in  aur.inc.php and
pkgfuncs.inc.php
* Centralization of DB code important in a future transition to PDO interface

Signed-off-by: canyonknight <canyonknight@gmail.com>
Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>