Balance: reduce GProd a bit, since there are more targets now
Made bomb+fuel load affect evasion vs. fighters.  (Also affects fuel policy)
Make all aircraft slower across the map, so raids take longer
Balance: lower morale
Balance: lower Manc's Sv, since Fa don't depress Sv as much as they used to
Navaid production changes, including ALLGEE event

* 2 months after a navaid is developed, production increases significantly.
* After ALLGEE, newly produced bombers all have GEE sets.
* Navaids are installed from the start of the bomber list, not the end.  (I
  don't know why we were doing it the other way - this way we get navaids and
  PFF tending to go together, which is better)
Probability that a Failure is deadly is now proportional to Fa value

Also, reduced the frequency of Failures, because raids now take longer since
 the speeds were reduced.
Targets: various tweaks, add Peenemunde, add target-flag FLAMMABLE