start and end values use calculate functions

If you use a calculate function on your values it is now applied on your start and end values as well (which are otherwise shown as given)

example: We use the slider for time of day. The start and end values would be shown as 0 and 1440 (for minutes) while the slider itself used minutes
Merge pull request #33 from elmalto/patch-1

start and end values to use calculate function