Fix "FATAL ERROR: BR-Class485Front - More livery types (2) than liveries (2)!"
Fix "FATAL ERROR: BR-312-MBSO - More livery types (0) than liveries (0)!"
Merge branch 'master' of git@github.com:jamespetts/simutrans-pak128.britain.git into half-heights
CHANGE: Update simuconf.tab to work with the new alternative destination settings.
CHANGE: Increase alternative destination values.
CHANGE: Slight adjustment in alternative destinations.
FIX: The Handysize cargo ship had far too low a capacity: it should have at least 20,000 tonnes of deadweight capacity
FIX: More accurate weights for oil type cargoes
ADD: Handley Page O/400 (Giuseppe)
FIX: Maximum loading time for the Handley-Page O/400 passenger aircraft not stipulated.
FIX: Some anomalies with translation texts for aircraft
CHANGE: Recalibrate the passenger generation quantities to match accurate ratios
CHANGE: Improvements to some texts
CHANGE: Recalibrate mail based on realistic generation levels
ADD: Handley Page W8b
CHANGE: Increase alternative destinations
CHANGE: Slightly increase journey time tolerances for commuters
CHANGE: Increase passenger and mail generation ratios
Merge branch 'Payload' of https://github.com/Milkogit/simutrans-pak128.britain.git into half-heights
CHANGE: Reduce the maximum number of boats on canals and rivers, which is now achievable without deadlock owing to recent improvements in the code. These lower figures are more realistic than the previous higher figures.
CHANGE: Reduce the number of alternative destinations for visiting passengers to below the level for commuting passengers.
ADD: Douglas DC2 Pax
CHANGE: Ford Trimotor Pax, retire date.

Signed-off-by: Milko <Beppe@giuseppe.(none)>