added failing tests for passing strings to xss_foliate
added failing tests for passing strings to xss_foliate

phaza/loofah,Joas1988/loofah-activerecord,Joas1988/loofah-activerecord,flavorjones/loofah-activerecord,jstorimer/loofah,Joas1988/loofah-activerecord,jstorimer/loofah,flavorjones/loofah-activerecord,flavorjones/loofah,flavorjones/loofah,Joas1988/loofah-activerecord,11factory/loofah,flavorjones/loofah,phaza/loofah