simhalt.cc: fix rotation problem
simcity.cc: iterate over whole map when deleting cities, just in case
simvehikel.cc: signal fix from James's tree
gebaeude.cc, gebaeude.h: growth score accessors
simvehikel.cc: growth score
gebaeude.cc: growth score code
simcity.cc: growth score code
return gebaeude_t *s, not bools, from the construction/upgrade methods
reinstate old shorter-than-a-month growth interval
remove debug fprintfs
try harder to find a building of the right level when downgrading
copy growth score when upgrading
tweak passenger/mail factors
don't recheck road connections every time, now that bug is fixed
remove debugging code