make example.py code runable under ipython
made black default color
updated theme w/ not quite black; different fonts
Update contributing.md
fixed spacing in docstring
Merge pull request #72 from mdupui01/patch-1

Typo
Merge pull request #74 from jhaynes/patch-1

fixed spacing in docstring
semi-working w/ default ash black colors
Initial version of testing framework

The testing framework is mostly a copy of the matplotlib framework
and uses most of the testing facility of matplotlib.

To write tests see the examples in  ggplot/tests/ or matplotlib/tests
and the matplotlib testing documentation:
http://matplotlib.org/devel/testing.html#testing
Add new tests to default_test_modules in ggplot.tests.__init__.py

To run the tests:
cd temp
python -c "import ggplot.tests;ggplot.tests.test()"
OR
python tests.py -v -d
Merge pull request #77 from JanSchulz/testing_framework

Initial version of testing framework
Merge branch 'master' of github.com:yhat/ggplot
adding pandas to dependencies; removing extra things from .gitignore
updated example images
newer main image
todos
vertical alignment for labels on facet_grid
Merge branch 'master' of git://github.com/yhat/ggplot into vertical_align_facet_grid_labels
other Python3 fixes
other Python3 fixes (on examples)
Merge pull request #78 from johncollins/vertical_align_facet_grid_labels

Vertical align facet grid labels