Add the property numberOfRounds to CircularSlider class instead of RangeCircularSlider
Add documentation to some properties
Remove struct Time
Keep the distance in RangeCircularSlider (sometimes we need to fix the distance between start thumb and endThumb)
Keep the code to secure the values of endPointValue and startPointValue, this code fix also an issue (in this version) in midPointCircularSlider example
The pull request #15 with a few little changes
struct Time