Add cursory help page detailing bindings

     def get(self):
         """Render your homepage."""
         return app.view.index()
+
+
+@app.control("help")
+class Help:
+    """Your help page."""
+
+    def get(self):
+        """Render your help page."""
+        return app.view.help()

+$def with ()
+$var title: Help
+
+<style>
+dt {
+  display: inline-block;
+  font-family: UbuntuMonoPowerline;
+  width: 15%;
+}
+dd {
+  display: inline-block;
+  margin-left: 0;
+  width: 85%;
+}
+</style>
+
+<h2>Keyboard Bindings</h2>
+
+<dl>
+<dt>?
+<dd>show this help page
+<dt>A-r
+<dd>toggle room mode
+<dt>A-s
+<dd>sign in/out
+</dl>
+
+<h3>Site Mode</h3>
+<dl>
+<dt>q
+<dd>focus query input
+<dt>f
+<dd>show link follow overlays (home row keys)
+<dt>m
+<dd>go home
+<dt>d
+<dd>close page
+<dt>r
+<dd>reload page
+<dt>h
+<dd>go back
+<dt>j
+<dd>scroll down 3 ems
+<dt>k
+<dd>scroll up 3 ems
+<dt>l
+<dd>go forward
+<dt>u
+<dd>go up a level in the site hierarchy
+<dt>p
+<dd>go to the previous item in the current collection
+<dt>n
+<dd>go to the next item in the current collection
+<dt>[
+<dd>page up
+<dt>]
+<dd>page down
+<dt>{
+<dd>go to the top of the page
+<dt>}
+<dd>go to the bottom of the page
+<dt>esc
+<dd>stop current movement or cancel link follow overlays
+</dl>
+
+<h4>Diagnostics</h4>
+<dl>
+<dt><kbd>A-.</kbd>
+<dd>toggle typographical rhythm indicator
+</dl>
+
+<h3>Room Mode</h3>
+<dl>
+<dt>w
+<dd>walk forward
+<dt>a
+<dd>strafe left
+<dt>s
+<dd>walk backward
+<dt>d
+<dd>strafe right
+<dt>h
+<dd>pan left
+<dt>j
+<dd>scroll map down
+<dt>k
+<dd>scroll map up
+<dt>l
+<dd>pan right
+<dt>~
+<dd>toggle map
+<dt>A-a
+<dd>toggle audio
+<dt>A-v
+<dd>toggle video
+</dl>
+
+<h2>Voice Bindings</h2>
+<dl>
+<dt>help
+<dd>
+<dt>query for
+<dd>
+<dt>go
+<dd>
+<dt>follow
+<dd>
+<dt>tell me
+<dd>
+</dl>