Refactor code for getting domain of a scale; don't scale all the way to 0 if the minimum value isn't close to 0
Refactor code for getting domain of a scale; don't scale all the way to 0 if the minimum value isn't close to 0

josilber/StackOverflowElectionViewer,josilber/StackOverflowElectionViewer,josilber/StackOverflowElectionViewer