Made /modules/ page public

_modules/index.html → modules.html

@@ -4,6 +4,14 @@ title: Modules
 url: /modules/
 ---
 
+<p>
+  These are the present modules currently available for authoring a
+  Rule. Press the icon next to a module's name for details about
+  it. Not all entries are
+  complete. Please <a href="mailto:medlab@colorado.edu">write to
+  us</a> with suggestions for additional modules or improvements to
+  existing ones.
+</p>
 
 {% assign modules_array = site.modules | sort: "type" | reverse %}
 {% for module in modules_array %}