Moved models docs to api docs

docs/api.rst

@@ -0,0 +1,9 @@
+.. _api:
+
+API
+===
+
+.. toctree::
+   :maxdepth: 2
+
+   models

docs/models.rst

@@ -1,7 +1,7 @@
 .. _models:
 
-Available Models
-================
+Models
+======
 
 FlaskBB uses SQLAlchemy as it's ORM. The models are split in three modules
 which are covered below.