Update docs index

docs/source/index.rst

@@ -6,21 +6,28 @@ Welcome to HackRF's documentation!
    :maxdepth: 2
    :caption: User Documentation
 
-   getting_started_hackrf_gnuradio
-   hackrf_sweep   
-   operating_system_tips   
    hackrf_one
    opera_cake
-   updating_firmware   
    faq
-   hackrf_hacks
    getting_help
    tips_tricks
+   hackrf_hacks   
 
 .. toctree::
    :maxdepth: 2
-   :caption: Firmware Developer Notes
+   :caption: Software
 
+   operating_system_tips
+   getting_started_hackrf_gnuradio
+   software_support
+   libhackrf_api
+   hackrf_sweep
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Firmware
+
+   updating_firmware
    firmware_development_setup
    LPC43XX_Debugging
    LPC43XX_SGPIO_Configuration
@@ -29,7 +36,7 @@ Welcome to HackRF's documentation!
 
 .. toctree::
    :maxdepth: 2
-   :caption: Hardware Developer Notes
+   :caption: Hardware
 
    hardware_components
    clocking
@@ -37,14 +44,7 @@ Welcome to HackRF's documentation!
 
 .. toctree::
    :maxdepth: 2
-   :caption: Software Developer Notes
+   :caption: Retired Content
-
-   software_support
-   libhackrf_api   
-
-.. toctree::
-   :maxdepth: 2
-   :caption: Old Content
 
    jawbreaker
    design_goals