Regen all docs. (#700)

* Stop recursing if discovery == {}

* Generate docs with 'make docs'.
diff --git a/docs/dyn/discovery_v1.html b/docs/dyn/discovery_v1.html
index 95d8aab..5c7a881 100644
--- a/docs/dyn/discovery_v1.html
+++ b/docs/dyn/discovery_v1.html
@@ -72,7 +72,7 @@
 
 </style>
 
-<h1><a href="discovery_v1.html">APIs Discovery Service</a></h1>
+<h1><a href="discovery_v1.html">API Discovery Service</a></h1>
 <h2>Instance Methods</h2>
 <p class="toc_element">
   <code><a href="discovery_v1.apis.html">apis()</a></code>