added Tollhouse Couponing

A river toll house where all those who pass must pay a toll, such as Castle Pfalzgrafenstein (http://4.bp.blogspot.com/-ZH5yDgwZT0s/Uonjn7ooa-I/AAAAAAAAQqU/B6O8QqncuxQ/s1600/6+ackerman+Kaub_und_Pfalzgrafenstein_1820.jpg)