Fix a comment
Fix PFF assignment to occur on correct date
Started writing a strategy guide
Rework the industry type classification
Track production of industry types
Implemented effects of various iclasses on defences
Filled in GProds in the sav.ins
stats: teach hsave about changed GProd format
Documented change to save-format
Decay the gprod[UBOOT] (though it doesn't do anything)
stats: Added GP event (class Misc) and a report to track it
stats: add Industries to extra_data
stats: whitespace (align '}') in extra_data
stats: Add 'gprodgraph' to track enemy production
Prevent BB stock from growing too huge (decay it 1%)
Prevent OIL stock from growing too high (decay it 2%)
Rebalancing of industries, and added Wilhelmshaven as a city
Fix segfault when city picture missing
Fix ABD and RUHR sav.in
Fix Wilhelshaven (city) target & add citymap