removed intermediate generated CSS files.
removed unused ref to dojo/dom-construct
add sample to illustrate message customization.
renamed property displayValues to displayExtMsg
change indeterminate value from Infinity to NaN
fixes misinterpretation of aria-valuenow.
Ensure value property reflects the actual value after value reconciliation. Improve value reconciliation (min < value < max).
fix hard coded CSS base class name.
Add unit tests.
rename duiBackground => d-background.
rename enteredViewCallback => attachedCallback (from delite/Widget)