Hi, thanks for this project!

I have a question about a step function. When you look at my fork of your demo:
http://embed.plnkr.co/z7uOlJ6wAUUTi08fcgHa/preview

There is slider from 0 to 10. Step is 1. But when you slide, you have 2 steps for each number. Therefore step is not 1 but 2. Am I doing something wrong? How can I set step to be really 1?