Revert back to not specifying text/markdown due to broken setup.py su…

…pport

Signed-off-by: Mikolaj Pawlikowski <mikolaj@pawlikowski.pl>

setup.py

@@ -14,7 +14,7 @@ def read(fname):
     license=read('LICENSE'),
     description='PowerfulSeal - a powerful testing tool for Kubernetes clusters',
     long_description=read('README.md'),
-    long_description_content_type="text/markdown",
+    #long_description_content_type="text/markdown",
     install_requires=[
         'ConfigArgParse>=0.11.0,<1',
         'Flask>=1.0.0,<2',