Brush support

[codesuki]

I added horizontal (X-Axis) Brush support, but the code needs refactoring and I am not completely sure how to best integrate Brush support with default charts and scales. Thinking about giving an option to show a default Brush or just leave Brushes for use with custom scales. Probably the former if I can make it work nicely. Other open questions, should the Brush share the SVG with the Graph or have its own..

Any feedback is welcome.

[jean-Phil]

Hello Neri,

First, thank you for your endeavour. Looking at your code has inspired me new ways of doing things with react and d3.

I'd be interested to delve deeper into the brush component. I tried to go through your code, but I don't get it just yet. If you were willing to explain to me the broad lines, and where you'd like to go from here, maybe I could do some work on that part of the project.

[codesuki]

Do you have an example of what you would like to add? Then maybe I could try explaining using that.
Sorry for the late response!