(svn r5624) Use {IsPlainRailTile,IsRailDepot,IsRailWaypoint,HasSignals}() instead of GetRailTile{T,Subt}ype() - this is more concise and a bit more flexible if/when the rail tile encoding changes
/* $Id */
KNOWN BUGS / PROBLEMS:
Normal and elrail depots look the same. Use 'X' (transparent buildings)
to distinguish between them
Missing curors / icons for construction (currently using the conventional ones)