implemented integerSubtraction and integerAddition in envi.__init__
implemented integerSubtraction and integerAddition in envi.__init__

bat-serjo/vivisect,vivisect/vivisect,vivisect/vivisect,joshuahoman/vivisect,atlas0fd00m/vivisect,joshuahoman/vivisect,joshuahoman/vivisect,atlas0fd00m/vivisect,cmaruti/vivisect,bat-serjo/vivisect,vivisect/vivisect,atlas0fd00m/vivisect,cmaruti/vivisect,bat-serjo/vivisect,cmaruti/vivisect