Create an demo page to showcase features of the grid

[vaishal]

No description provided.

[jackbrewer]

We already have this: http://clocklimited.github.io/responsive-grid/ (listed under the repo title) but I think it could do with a refresh. Something a bit simpler / cleaner. I think it's in the github-pages branch if anyone wants to contribute.

[vaishal]

Ok I meant a demo page then to show the grid in action.

[jackbrewer]

Agreed. The grid can do a lot more than we show - especially across breakpoints etc.

[jackbrewer]

With the release of 1.0.0, the gh-pages branch is now out of date. We should consider a rewrite of this branch to better show off the full feature set.