docs: clean up index page, add list of supported devices

docs/index.rst

 Welcome to Gluon
 ================
 
-Gluon is an sophisticated framework for developing OpenWRT based firmwares.
-Being in an early development stage it is used by several Freifunk communities
-in Germany.
+Gluon is a modular framework for creating OpenWrt-based firmwares for wireless mesh nodes.
+Several Freifunk communities in Germany use Gluon as the foundation of their Freifunk firmwares.
 
-Features
---------
-
-Supported Devices
------------------
-
-License
--------
 
 User Documentation
 ------------------
@@ -44,6 +35,50 @@ Developer Documentation
 
    dev/basics
 
+Supported Devices
+-----------------
+
+* TP-Link
+
+  - TL-WR740N (v1, v3, v4)
+  - TL-WR741N/ND (v1, v2, v4)
+  - TL-WR841N/ND (v3, v5, v7, v8, v9)
+  - TL-WR842N/ND (v1, v2)
+  - TL-WR941N/ND (v2, v3, v4)
+  - TL-WR1043N/ND (v1)
+  - TL-WDR3500 (v1)
+  - TL-WDR3600 (v1)
+  - TL-WDR4300 (v1)
+  - TL-WA901N/ND (v2)
+  - TL-MR3020 (v1)
+  - TL-MR3040 (v1)
+  - TL-MR3220 (v1)
+  - TL-MR3420 (v1, v2)
+
+* Ubiquiti
+
+  - Bullet M2
+  - Nanostation M2
+  - Picostation M2
+  - UniFi AP
+  - UniFi AP Outdoor
+
+* D-Link
+
+  - DIR-615 (E1)
+  - DIR-825 (B1)
+
+* Linksys
+
+  - WRT160NL
+
+License
+-------
+
+See LICENCE_
+
+.. _LICENCE: https://github.com/freifunk-gluon/gluon/blob/master/LICENSE
+
 Indices and tables
 ==================