refs #23 merged debian packaging scripts from 5.6-debian

Origin of scripts:

commit 79053fd1d1362b865a658065b0cc132c1ed85e73
Author: Otto Kekäläinen <otto.kekalainen@seravo.fi>
Date:   Fri Nov 21 21:30:58 2014 +0200

    Imported debian/* from MySQL 5.6.20 in official Debian repositories (commit id 52dc82c)