Added a test for kmMat3IsIdentity
Added a test for kmMat3IsIdentity

hgl888/kazmath,Kazade/kazmath,prideout/kazmath,prideout/kazmath,Kazade/kazmath,hgl888/kazmath,hgl888/kazmath,Kazade/kazmath,prideout/kazmath,Kazade/kazmath,hgl888/kazmath