Specifying README.md is in markdown mode.

So it renders well in PyPi.

Author: asolino

setup.py

@@ -28,6 +28,7 @@ def read(fname):
       maintainer_email = "bethus@gmail.com",
       license = "Apache modified",
       long_description = read('README.md'),
+      long_description_content_type="text/markdown",
       platforms = ["Unix","Windows"],
       packages=['impacket', 'impacket.dcerpc', 'impacket.examples', 'impacket.dcerpc.v5', 'impacket.dcerpc.v5.dcom',
                 'impacket.krb5', 'impacket.ldap', 'impacket.examples.ntlmrelayx',