Update README.md with some links (#75)

* Update README.md with links to other projects using same protocol
Update README.md with reference links to other projects using same protocol

* Update README.md with PyPI release links
Update README.md with PyPI release links

Author: Hedda

README.md

@@ -5,7 +5,22 @@
 
 [zigpy-deconz](https://github.com/zigpy/zigpy-deconz) is a Python 3 implementation for the [Zigpy](https://github.com/zigpy/) project to implement [deCONZ](https://www.dresden-elektronik.de/funktechnik/products/software/pc/deconz/) based [Zigbee](https://www.zigbee.org) radio devices.
 
-
 This uses the deCONZ serial protocol for communicating with [ConBee](https://www.dresden-elektronik.de/conbee/), [ConBee II (ConBee 2)](https://shop.dresden-elektronik.de/conbee-2.html), and [RaspBee](https://www.dresden-elektronik.de/raspbee/) adapters from [Dresden-Elektronik](https://github.com/dresden-elektronik/).
 
-Note! Documentation of the deCONZ serial protocol can currently be obtained by contacting Dresden-Elektronik employees via GitHub here https://github.com/dresden-elektronik/deconz-rest-plugin/issues/158
+# Releases via PyPI
+Tagged versions are also released via PyPI
+
+- https://pypi.org/project/zigpy-deconz/
+- https://pypi.org/project/zigpy-deconz/#history
+- https://pypi.org/project/zigpy-deconz/#files
+
+# External documentation and reference
+
+Note! Latest official documentation for the deCONZ serial protocol can currently be obtained by contacting Dresden-Elektronik employees via GitHub here
+-  https://github.com/dresden-elektronik/deconz-rest-plugin/issues/158
+
+For reference, here is a list of unrelated projects that also use the same deCONZ serial protocol for other implementations
+- https://github.com/Equidamoid/pyconz/commits/master
+- https://github.com/mozilla-iot/deconz-api
+- https://github.com/adetante/deconz-sp
+- https://github.com/frederic34/plugin-nodeBee