BLD Remove setup.py rst conversion. Add README.md as pypi description.

setup.cfg

@@ -2,3 +2,6 @@
 verbosity=2
 detailed-errors=1
 with-ignore-docstrings=1
+
+[metadata]
+description-file = README.md

setup.py

@@ -13,33 +13,9 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-import sys
 
 from setuptools import setup, find_packages
 
-LONG_DESCRIPTION = None
-README_MARKDOWN = None
-
-with open('README.md') as markdown_source:
-    README_MARKDOWN = markdown_source.read()
-
-if 'upload' in sys.argv:
-    # Converts the README.md file to ReST, since PyPI uses ReST for formatting,
-    # This allows to have one canonical README file, being the README.md
-    # The conversion only needs to be done on upload.
-    # Otherwise, the pandoc import and errors that are thrown when
-    # pandoc are both overhead and a source of confusion for general
-    # usage/installation.
-    import pandoc
-    pandoc.core.PANDOC_PATH = 'pandoc'
-    doc = pandoc.Document()
-    doc.markdown = README_MARKDOWN
-    LONG_DESCRIPTION = doc.rst
-else:
-    # If pandoc isn't installed, e.g. when downloading from pip,
-    # just use the regular README.
-    LONG_DESCRIPTION = README_MARKDOWN
-
 setup(
     name='zipline',
     version='0.7.0',