yhat/ggplot — pull request #113 by JanSchulz (2013-12-03 21:55:15+00:00)
Title: Only load data sets on use and not on import

Use a lazy load proxy for the datasets, which is some kind of hack
(see `ggplot/exampeldata/__init__.py` for the details) and means that
the data sets now need to be explicit imported (and not via `*`).

Closes: #111