Fix style script
Stub for singleton configuration class

Added a stub for configuration, which is needed in other places.
At this moment it doesn't parse any configuration.
Dump ARP table on arbitrary fd

In prevision to the dump status function, can dump the ARP
table to any file descriptor.
Device class

describes a device, loads the configuration for the device and
keeps track of the missed/responded pings, executing actions
when it's the case.
Check result of ping

Check the result of ping and report to the devices the status of the
last ping
Main module

Drives the daemon, reloads configuration and so on.
system(3) detached clone

It also changes the uid and gid
style