(svn r2756) Renamed railtypes into _railtypes
Renamed railtypes.c into railtypes.h, all other tables are in .h files. (It should be in the tables dir but I couldn't figure out how to get it there without deleting it first).
Added const and extern.

/* $Id$ */

#ifndef NAMEGEN_H
#define NAMEGEN_H

typedef byte TownNameGenerator(char *buf, uint32 seed);

extern TownNameGenerator * const _town_name_generators[];

#endif