For donut charts add options for fancy new padAngle options in d3 3.5 (still in development) as well as add option for cornerRadius on arcs.   Doesn't really apply to pie charts though.  Homer says donuts are better anyway.
update dev build to make bug fix available.
Merge branch 'development' of github.com:liquidpele/nvd3 into development
Update bower json to include my demo site and fix ignore files.