Capitalization of README.md is a problem
I guess it used to be readme.md, now its all caps.  This is causing problems with some incoming links. 

While we're at it, this readme does not render on PyPI, which we should fix.  We cannot change to the file to rst, since there are many inbound links to the md file, so we should figure out how to make PyPI work for md files.
diff --git a/setup.py b/setup.py
index 7b2690876..22162ac90 100644
--- a/setup.py
+++ b/setup.py
@@ -15,10 +15,17 @@ with open(ver_path) as f:
         if line.startswith('__version__'):
             exec(line, main_)
 
+# Read the contents of README file
+this_directory = os.path.abspath(os.path.dirname(__file__))
+with open(os.path.join(this_directory, 'README.md'), encoding='utf-8') as f:
+    long_description = f.read()
+
 setup(
     name='openpnm',
     description='A framework for conducting pore network modeling simulations '
     + 'of multiphase transport in porous materials',
+    long_description=long_description,
+    long_description_content_type='text/markdown',
     version=main_['__version__'],
     zip_safe=False,
     classifiers=[
['setup.py']