added package doc file

geometry/doc.go

@@ -0,0 +1,6 @@
+// Copyright 2016 The G3N 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 geometry implements several primitive geometry generators.
+package geometry

geometry/geometry.go

@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Package geometry allows the generation of geometries...
 package geometry
 
 import (