code format pieChart model, making indention consistent for the whole file.   No logic changes.
Fix small css bug on example site.
Remove un-used directories.
All the files had annoyingly inconsistent indention, so I ran it all through pycharm's auto-indent feature.   This commit touches everything, but no logic changed.
don't blow up on IE9 if nv.dev is on and dev tools are closed by also checking if console object exists at all.
Fix for http://github.com/novus/nvd3/pull/678, bullet charts without markers.
Add ability to turn off pie slice radius "growing" on hover by doing chart.growOnHover(false), also set one of the line chart examples to fill in area.
Ran auto-indent on the examples too in order to remove in consistent indention, no logic changes in this commit.   Also removed unused nations.json
found a way to not require the repetitive "enumerable" property in the new options object format.
Fix pie/donut chart tooltip option to work so you can overide tooltip content.
Merge branch 'development' into gh-pages