Make the charting visualization not suck

[dmasad]

The charting module (currently using Charts.js is (barely) functional, but ugly. The defaults should be made nicer, and the configuration should be more Pythonic.

[jeetu7]

When number of steps are large (say 100 or 1000) the ticks on x-asix looks very cluttered. The autoSkip option might help in this case. See http://www.chartjs.org/docs/#scales-ticks-configuration

[jackiekazil]

@jeetu7 That sounds like a great idea!

[jackiekazil]

This has made progress forward thanks to @cauemello!!
For now, I am closing this ticket lieu of more specific tickets.