(svn r12144) -Codechange: Adjust aircraft slowing algorithm so that very fast
aircraft slow down more rapidly than slower aircraft. This prevents them
from reaching the end of the runway at high speed, and also stops slow
aircraft from slowing down too much at the start of the runway.

Makefile*
bin/*
!bin/data/chars.grf
!bin/data/openttdd.grf
!bin/data/openttdw.grf
!bin/data/opntitle.grf
!bin/scenario/README
!bin/scripts*
config.*
objs/*
src/rev.cpp