Fixed mouse interaction tutorial (removed "mouseup" references)
Fixed mouse interaction tutorial (removed "mouseup" references)

CreateJS/EaselJS,Teino1978-Corp/https-github.com-Teino1978-Corp-EaselJS,ovcharik/EaselJS,rhildred/abacus,Teino1978-Corp/https-github.com-Teino1978-Corp-EaselJS,rhildred/abacus,CreateJS/EaselJS,ovcharik/EaselJS