(svn r2764) -Feature: Clone vehicles

-This allows a player to clone an excisting vehicle of his own
  -[fix]: this uncovered an excisting bug in CmdBuildRailVehicle() where depots could build trains of the wrong track type. This is fixed
  -Thanks to Celestar for drawing the sprites and _luca_ for including them in openttd.grf

command.c

@@ -159,6 +159,9 @@ DEF_COMMAND(CmdRemoveSignalTrack);
 
 DEF_COMMAND(CmdReplaceVehicle);
 
+DEF_COMMAND(CmdCloneVehicle);
+
+
 /* The master command table */
 static const Command _command_proc_table[] = {
 	{CmdBuildRailroadTrack,                  0}, /*   0 */
@@ -300,6 +303,7 @@ static const Command _command_proc_table[] = {
 	{CmdGiveMoney,                           0}, /* 113 */
 	{CmdChangePatchSetting,         CMD_SERVER}, /* 114 */
 	{CmdReplaceVehicle,                      0}, /* 115 */
+	{CmdCloneVehicle,						 0}, /* 116 */
 };
 
 /* This function range-checks a cmd, and checks if the cmd is not NULL */