Update setup.py

Author: Paul Miles

setup.py

@@ -22,7 +22,7 @@ def read(fname):
     version=__version__,
     description='A library to plot and analyze chains from mcmc simulations',
     long_description=long_description,
-    long_description_content_type='text/x-rst'
+    long_description_content_type='text/x-rst',
     url='https://github.com/prmiles/mcmcplot',
     download_url='https://github.com/prmiles/mcmcplot',
     author='Paul Miles',