Renamed RangeStartSelected/StopSelected to LowerValue/UpperValue
Add event handler for each of both events (Lower/Upper value changed)
Add missing RangeParameterChangedEventArgs to .NET45 Project
Merge branch 'feature/RangeSlider' of https://github.com/xxMUROxx/MahApps.Metro into feature/RangeSlider
Lower/UpperValue changed events now working. Thumb drag events not workig yet >_<