CHANGE: Fully recalibrate comfort, and add comfort levels to all passenger carrying water vehicles (this needs considerable further work, however)
CHANGE: Add catering level to ships and aircraft as appropriate
FIX: Add waterway constraint to the FBM Hydrocat
FIX: No smoke for the Clan Line steamer
FIX: The makefile now works with sound (Neroden)
FIX: Graphical error with snow image of staging inn (Neroden)
CHANGE: Shire horses have the same speed as road horses (will need attention in due course to add different horse types)