fixed dependencies

vendor/gonum.org/v1/gonum/num/quat/util.go

@@ -0,0 +1,26 @@
+// Copyright ©2018 The Gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package quat
+
+func lift(v float64) Number {
+	return Number{Real: v}
+}
+
+func split(q Number) (float64, Number) {
+	return q.Real, Number{Imag: q.Imag, Jmag: q.Jmag, Kmag: q.Kmag}
+}
+
+func join(w float64, uv Number) Number {
+	uv.Real = w
+	return uv
+}
+
+func unit(q Number) Number {
+	return Scale(1/Abs(q), q)
+}