setuptools-markdown is deprecated

this is causing deploy issues for the speed.pypy.org instance.

Author: ewdurbin

setup.py

@@ -11,8 +11,8 @@
     keywords=['benchmarking', 'visualization'],
     install_requires=['django>=1.11<2.2', 'isodate>=0.4.7,<0.6', 'matplotlib>=1.4.3,<2.0'],
     packages=find_packages(exclude=['ez_setup', 'sample_project']),
-    setup_requires=['setuptools-markdown'],
-    long_description_markdown_filename='README.md',
+    long_description='README.md',
+    long_description_content_type="text/markdown",
     description='A web application to monitor and analyze the performance of your code',
     include_package_data=True,
     zip_safe=False,