Adding more documentation and tweaking operations
diff --git a/openstack/networking/v2/extensions/layer3/doc.go b/openstack/networking/v2/extensions/layer3/doc.go
new file mode 100644
index 0000000..d533458
--- /dev/null
+++ b/openstack/networking/v2/extensions/layer3/doc.go
@@ -0,0 +1,5 @@
+// Package layer3 provides access to the Layer-3 networking extension for the
+// OpenStack Neutron service. This extension allows API users to route packets
+// between subnets, forward packets from internal networks to external ones,
+// and access instances from external networks through floating IPs.
+package layer3