MRG- Website Update

Finally ready - I'll do a review of this PR too - as I may spot things I missed before.

But for now, this version is working and ready for the most part.

Let me know if you find any other little glitches or desired changes..

As of this PR, there still needs content here and there, but layout-wise I think all is ready.

Reviews welcome! 

Online build available [here](http://jaquesgrobler.github.io/online-sklearn-build/index.html) for inspection

Side-note: I've just fixing up the mobile/tablet versions.. that'll be ready tomorrow