Add Dgetf2 (unblocked LU algorithm) and tests

fixed incorrect comment and incorrect test

Real permutations and PR comments

Add cgo tests

fix indexing error

change return to ok

fix okays

fix ok

cgo/lapack_test.go

@@ -15,3 +15,7 @@ var impl = Implementation{}
 func TestDpotrf(t *testing.T) {
 	testlapack.DpotrfTest(t, impl)
 }
+
+func TestDgetf2(t *testing.T) {
+	testlapack.Dgetf2Test(t, impl)
+}