(svn r13513) -Codechange: Give proper message when building a river fails.
Give proper description of a river tile with the Query Tool.
Extracted (in part) from FS#1884, by Ammler

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