(svn r12058) -Fix: Teach NPF where road vehicles and trams can reverse.
-Fix: Ships can drive through opponents' ship depots. (Thanks SmatZ)
-Codechange: Split NPFFollowTrack() in smaller parts.

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