Floats improperly handled in axis scaling / points calculation

[Cody-G-G]

My dataset has the following X values: 1.78, 1.83, 2.0, 2.46.

As you can see, it gets quite ugly...some (simple?) solutions would be to limit the number of digits after the decimal point (I imagine 2 digits for the fractional part would be sufficient for scenarios that involve mobile graphs....), or rounding the fractional part after a number of digits over the decimal point.

Edit: I see this is an issue from the lodash range method...maybe since lodash is MIT licensed the method can simply be copied and improved with the proper handling?

[marzolfb]

This is likely a duplicate of #28 - but will need to take a closer look later.

[marzolfb]

@Cody-G-G See my design thoughts on #28 - you have any feedback to contribute there?