adding docs for a whole bunch more stuff

mkdocs.yml

@@ -13,7 +13,12 @@ nav:
   - Getting Started:
     - Installation: getting-started/installation.md
     - Usage: getting-started/usage.md
-  - Reference: ref/zipline.md
+  - Reference:
+    - Zipline: ref/zipline.md
+    - Utilities: ref/utils.md
+    - Exceptions: ref/exceptions.md
+    - Models: ref/models.md
+    - Rest Adapter: ref/rest_adapter.md
 
 plugins:
   - git-revision-date-localized:
@@ -29,6 +34,7 @@ plugins:
           options:
             docstring_options:
               ignore_imit_summary: true
+            summary: true
 
 markdown_extensions:
   - abbr