changed icon for freezer ( issue #614 ), for rope (to be easier to recognize) and cluster bomb (to be easier to recognize and to so that it can be distinguished from the regular grenade's icon even when no color is present or perceived

Jim
Ramirez
Roy
Joe
Rob
Dan
Tom
Ernesto
Douglas
Mario
Jose
Francisco
Brian
Cooper
Salvador
Javier
Ara
Cinzia
Rafael
Claudio
Franzo
Juan