Added examples data subdirectories to package_data (#1375)

Author: Chris Fonnesbeck

setup.py

@@ -51,7 +51,7 @@
                     'pymc3.step_methods', 'pymc3.tuning',
                     'pymc3.tests', 'pymc3.glm', 'pymc3.examples',
                     'pymc3.backends', 'pymc3.variational', 'docs', '.'],
-          package_data={'pymc3.examples': ['data/*.*'],
+          package_data={'pymc3.examples': ['data/*', 'data/*/*'],
                         '.': ['requirements.txt', '*.md'],
                         'docs': ['source/*/*', 'source/*/*/*']},
           classifiers=classifiers,