Add mysql dependency
Add mysql dependency

To rectify failing to start after reboot.  
Checking rc*.d files both feedwriter and mysql are given the same priority - S03 and as feedwriter (alphabetically) comes before mysql, feedwriter starts first, resulting in error;  
2015-09-28 17:33:24.481|ERROR|feedwriter.php|Can't connect to database:Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
thaipowertech/emoncms,emoncms/emoncms,emoncms/emoncms,emoncms/emoncms,jeremypoulter/emoncms,thaipowertech/emoncms,jesjimher/emoncms,inverse/emoncms,jeremypoulter/emoncms,chaveiro/emoncms,chaveiro/emoncms,jeremypoulter/emoncms,thaipowertech/emoncms,jesjimher/emoncms,emoncms/emoncms,chaveiro/emoncms,emoncms/emoncms,chaveiro/emoncms,inverse/emoncms,inverse/emoncms,jesjimher/emoncms,jeremypoulter/emoncms,jesjimher/emoncms,inverse/emoncms,thaipowertech/emoncms