Upddated Cascades sample applications to10.1.0 Beta,

Updated samples: bucketlist, cascadescookbookcpp, cascadescookbookqml, cowbell, hellocascades, helloforeignwindow, kakel, lightningcrossfadecpp, lightningcrossfadeqml, photobomber, poemmaker, pullmybeard, quotes, speedwriter, stampcollector, starshipsettings, tldr, weatherguesser