fix setup.cfg

setup.cfg

@@ -5,7 +5,7 @@ author = Christoph Paulik
 author-email = [email protected]
 license = BSD 3 clause
 home-page = http://www.github.com/TUW-GEO/pynetcf
-description-file = README.md
+description-file = README.rst
 # Add here all kinds of additional classifiers as defined under
 # https://pypi.python.org/pypi?%3Aaction=list_classifiers
 classifiers = Development Status :: 4 - Beta,