Improve on addition of Binding to Concepts article (#4899)
Improve on addition of Binding to Concepts article (#4899)

* Addresses openhab/openhab-docs/#604
* Improves explanation

Signed-off-by: Brad Gilmer <9233b6f5388d6867a2a7be14d8b4ba53c86cfde2@gilmer.tv>

Snickermicker/smarthome,Snickermicker/smarthome,Snickermicker/smarthome,Snickermicker/smarthome