Import Picking and placing single houses in scenario editor patch

Minor whitespace fixes

http://www.tt-forums.net/viewtopic.php?f=33&t=68894&view=unread#p1099696

src/town_type.h

@@ -13,10 +13,13 @@
 #define TOWN_TYPE_H
 
 #include "core/enum_type.hpp"
+#include "core/smallvec_type.hpp"
 
 typedef uint16 TownID;
 struct Town;
 
+typedef SmallVector<TownID, 8> TownList;
+
 /** Supported initial town sizes */
 enum TownSize {
 	TSZ_SMALL,  ///< Small town.