BLD Added package_data information to setup.py (pymc-devs#1340)

* Added package_data information to include non-Python files in source distribution

* Removed MANIFEST.in

Author: Chris Fonnesbeck

MANIFEST.in

@@ -50,8 +50,10 @@
           packages=['pymc3', 'pymc3.distributions',
                     'pymc3.step_methods', 'pymc3.tuning',
                     'pymc3.tests', 'pymc3.glm', 'pymc3.examples',
-                    'pymc3.backends', 'pymc3.variational'],
-          package_data = {'pymc3.examples': ['data/*.*']},
+                    'pymc3.backends', 'pymc3.variational', 'docs', '.'],
+          package_data={'pymc3.examples': ['data/*.*'],
+                        '.': ['requirements.txt', '*.md'],
+                        'docs': ['source/*/*']},
           classifiers=classifiers,
           install_requires=install_reqs,
           tests_require=test_reqs,