dimmer examples.swift

// Dimmer.Request
.increase(.brightness,by:10.pt,on:light))
.decrease(.brightness,by:10.pt,on:light))
.increase(.hue,       by:10.pt,on:light))
.decrease(.hue,       by:10.pt,on:light))

// Dimmer.Response
.increase(.brightness,by:10.pt,on:light,.succeeded     )
.increase(.colortemp, by:10.pt,on:light,.succeeded     )
.decrease(.hue,       by:10.pt,on:light,.succeeded     )
.decrease(.saturation,by:10.pt,on:light,.succeeded     )
.increase(.brightness,by:10.pt,on:light,.failed(error)))
.increase(.colortemp, by:10.pt,on:light,.failed(error)))
.decrease(.hue,       by:10.pt,on:light,.failed(error)))