moving "overviews" to "customization"

docs/index.rst

@@ -26,24 +26,9 @@ For users
 =========
 
 
-Supported input devices
------------------------
-.. toctree::
-   :maxdepth: 2
-   :glob:
-
-   hardware-devices/*
-
-Topic overviews
----------------
-.. toctree::
-   :maxdepth: 1
-   :glob: 
-
-   overviews/*
 
-Customization reference
+Customizing your firmware
------------------------
+-------------------------
 .. toctree::
    :maxdepth: 1
    :glob: 
@@ -58,6 +43,14 @@ Plugins
 
    plugins/*
 
+Supported input devices
+-----------------------
+.. toctree::
+   :maxdepth: 2
+   :glob:
+
+   hardware-devices/*
+
 
 For developers
 ==============