Bars can read from csv now.

Had to manually copy your changes to main.html, since PR #5 is not merged yet. In retrospect, I was not sure whether I should have just committed my changes to bars.coffee. It makes sense if we assume your PR will be pulled first, in that case my PR is like a patch, or delta. However this prevents me from testing the code before pushing, so essentially, if we treat this PR in isolation, I would have been pushing a broken build.

Also I did not include data.csv, with the assumption that it will be included with PR #5