Added contact sensor capability per @zvika77 request to allow integration with SHM. Contact will close when the shade reports as closed, and will open when the shade reports as partially open or open.
On/off switch will also now mirror the state of the shade – on when the shade is partially open or open, and off when the shade is closed. This should allow the shade to be included as a switch in ActionTiles (ActionTiles does not currently support the windowShade capability).
Setting an open/closed offset in the device settings will change when the shade/switch/contact report as open/on or closed/off. Default is open at 95% or more, closed at 5% or less, and partially open in between.