And all of the rest of the token operations.

Plus tests for each.
diff --git a/openstack/identity/v3/tokens/doc.go b/openstack/identity/v3/tokens/doc.go
new file mode 100644
index 0000000..02fce0d
--- /dev/null
+++ b/openstack/identity/v3/tokens/doc.go
@@ -0,0 +1,6 @@
+/*
+Package tokens defines operations performed on the token resource.
+
+Documentation: http://developer.openstack.org/api-ref-identity-v3.html#tokens-v3
+*/
+package tokens