Merge pull request #5 from mlippert/barchart

Barchart has groups around rects
Remove Mac .DS_Store file
Merge remote-tracking branch 'refs/remotes/origin/master' into widget-refactor
New design, using cntr.append and widget.draw for LineGraph is drawing something
More refactoring of Axes, removed Axes.innerWid .innerHt, used local vars may need to add back.

Started trying to refactor out an individual Axis, need to read up on javascript inheritance.