(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.

railtypes.h

@@ -0,0 +1,56 @@
+/* $Id: */
+
+/** @file railtypes.h
+ * All the railtype-specific information is stored here.
+ */
+
+/** Global Railtype definition
+ */
+const RailtypeInfo _railtypes[RAILTYPE_END] = {
+	{
+		{
+			SPR_RAIL_TRACK_Y,
+			SPR_RAIL_TRACK_N_S,
+			SPR_RAIL_TRACK_BASE,
+			SPR_RAIL_SINGLE_Y,
+			SPR_RAIL_SINGLE_X,
+			SPR_RAIL_SINGLE_NORTH,
+			SPR_RAIL_SINGLE_SOUTH,
+			SPR_RAIL_SINGLE_EAST,
+			SPR_RAIL_SINGLE_WEST
+		},
+		SPR_RAIL_SNOW_OFFSET,
+		(1 << RAILTYPE_RAIL),
+	},
+	{
+		{
+			SPR_MONO_TRACK_Y,
+			SPR_MONO_TRACK_N_S,
+			SPR_MONO_TRACK_BASE,
+			SPR_MONO_SINGLE_Y,
+			SPR_MONO_SINGLE_X,
+			SPR_MONO_SINGLE_NORTH,
+			SPR_MONO_SINGLE_SOUTH,
+			SPR_MONO_SINGLE_EAST,
+			SPR_MONO_SINGLE_WEST
+		},
+		SPR_MONO_SNOW_OFFSET,
+		(1 << RAILTYPE_MONO),
+	},
+	{
+		{
+			SPR_MGLV_TRACK_Y,
+			SPR_MGLV_TRACK_N_S,
+			SPR_MGLV_TRACK_BASE,
+			SPR_MGLV_SINGLE_Y,
+			SPR_MGLV_SINGLE_X,
+			SPR_MGLV_SINGLE_NORTH,
+			SPR_MGLV_SINGLE_SOUTH,
+			SPR_MGLV_SINGLE_EAST,
+			SPR_MGLV_SINGLE_WEST
+		},
+		SPR_MGLV_SNOW_OFFSET,
+		(1 << RAILTYPE_MAGLEV),
+	},
+};
+