Fixed up debian init scripts

 - added --make-pidfile and --background to start-stop-daemon
 - added execute bit to debian/init.d so that initscript gets installed
   correctly
 - Changed install path of statsrelay to sbindir to make it consistent
   with the install path that the debian initscript is expecting
Merge pull request #1 from davewongillies/master

Fixed up debian init scripts