Experiment with BEM CSS model

[GaurangTandon]

Writing in the current js files, it's hard to guess which classes are for js modification (event handling) and which are for css modification (applying styles).

[GaurangTandon]

Good read before doing this - http://maintainablecss.com/chapters/introduction/

[jaidevshriram]

Oh I forgot to tell you. Given the current direction of color schemes. I was considering having all classes start with either light-* or dark-* to accommodate for both themes. A dark theme could be a much later update but it would look good in this scenario.

[GaurangTandon]

That is quite good :)