v0.12.0a0

This is the first alpha for seaborn v0.12.0, a major release that introduces an entirely new interface in the seaborn.objects namespace.

For more information about the new interface, see the development docs at http://seaborn.pydata.org/nextgen.

Please experiment with the alpha version and provide feedback on things that are confusing or don't work, but expect some rough edges and instability.