(svn r12907) [0.6] -Backport from trunk r12906:
- Fix: Vehicle groups, engine replacement rules and player/company names were not properly reset/freed after bankrupt (r12906)
[0.6] -Prepare: for 0.6.1-RC1.

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