Add doc for ACL
diff --git a/rackspace/lb/v1/acl/doc.go b/rackspace/lb/v1/acl/doc.go
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+/*
+Package acl provides information and interaction with the access lists feature
+of the Rackspace Cloud Load Balancer service.
+
+The access list management feature allows fine-grained network access controls
+to be applied to the load balancer's virtual IP address. A single IP address,
+multiple IP addresses, or entire network subnets can be added. Items that are
+configured with the ALLOW type always takes precedence over items with the DENY
+type. To reject traffic from all items except for those with the ALLOW type,
+add a networkItem with an address of "0.0.0.0/0" and a DENY type.
+*/
+package acl