* Update zha.markdown to clearify use of zigpy and support for multiple radios
Update zha.markdown to clarify the use of the zigpy library and support for multiple Zigbee radios from different manufacturers. Also tried to separate radio modules from actual retail products which use those radios under "Known working Zigbee radio modules".
Please note that I mostly wanted to add this clarification in the hope that new developers will be made aware and join in improving these existing libraries or maybe even creating new radio module libraries for adding support for additional radios from different manufacturers. One example here is https://github.com/Equidamoid/pyconz/ which begun after he seen discussion in https://github.com/dresden-elektronik/deconz-rest-plugin/issues/158
* Fix list
Raspberry Pi Shield and USB adapter, compatible with Home Assistant and `bellows` python library. Based on Silabs EM35X MCU, compatible with ezsp protocol.
* Add support for ZigBee Home Automation
* Update binary_sensor.zha.markdown
Replace ZHA with ZigBee Home Automation
* Update light.zha.markdown
Replace ZHA with ZigBee Home Automation
* Update sensor.zha.markdown
Replace ZHA with ZigBee Home Automation
* Update switch.zha.markdown
* Update zha.markdown