doc updates

- split item and inserters api documentation
- fix some links
- fix warning about too short title underlines
- fix code for importing default config
- update front page/index

doc/api/index.rst

@@ -10,6 +10,7 @@ API Reference
    labeltool
    containers
    model
-   scene
    items
+   inserters
+   scene
 

doc/api/items.rst

@@ -4,9 +4,9 @@ Items
 
 This details the default visualization items that come with sloth.
 
-The following items are available in :mod:`sloth.items.items`:
+The following items are available in :mod:`sloth.items`:
 
-.. automodule:: sloth.items
+.. module:: sloth.items
 
 .. autoclass:: BaseItem
     :members:
@@ -23,14 +23,3 @@ The following items are available in :mod:`sloth.items.items`:
 .. .. autoclass:: PolygonItem
     :members:
 
-.. autoclass:: PointItemInserter
-    :members:
-    :undoc-members:
-
-.. autoclass:: RectItemInserter
-    :members:
-    :undoc-members:
-
-.. .. autoclass:: PolygonItemInserter
-    :members:
-    :undoc-members:

doc/api/model.rst

@@ -5,6 +5,7 @@ Model
 This details the model API.
 
 .. automodule:: sloth.annotations.model
+
 .. autoclass:: AnnotationModel
     :members:
     :undoc-members: