Move datastructures.go comment so godoc sees it

Author: alexandercampbell-wk

datastructures.go

@@ -1,11 +1,15 @@
-package datastructures
-
 /*
-Package datastructures exists solely to aid consumers of the
-go-datastructures library when using dependency managers.  Depman,
-for instance, will work correctly with any datastructure by simply
-importing this package instead of each subpackage individually.
+Package datastructures exists solely to aid consumers of the go-datastructures
+library when using dependency managers.  Depman, for instance, will work
+correctly with any datastructure by simply importing this package instead of
+each subpackage individually.
+
+For more information about the datastructures package, see the README at
+
+	http://github.com/Workiva/go-datastructures
+
 */
+package datastructures
 
 import (
 	_ "github.com/Workiva/go-datastructures/augmentedtree"