Support constraints vocabs

constraints/export_test.go

Index: constraints/export_test.go
=== modified file 'constraints/export_test.go'
--- constraints/export_test.go	2014-04-15 05:29:22 +0000
+++ constraints/export_test.go	2014-04-24 00:00:36 +0000
@@ -13,6 +13,6 @@
 	return cons.hasAny(attrTags...)
 }
 
-func AttributesWithValues(cons Value) []string {
+func AttributesWithValues(cons Value) map[string]interface{} {
 	return cons.attributesWithValues()
 }