Start of ACK/NAK implement
Better error messages
Pilot now send ACK or NAK following ATIS validity
Pilot & Server now properly treat ACK/NAK messages
Nettoyage du code à ma façon
Pilot dies if too much NAK without answer
Coloring error fix
rapport améliorer
update
Merge remote-tracking branch 'origin/rem'

Conflicts:
	pilot.c
code cleanup