Add Python 3 support marker in setup.py

With the new markers, it's clear to PyPi users that xattr works both on Python 2 and 3. This should be sufficient for xattr to show in green on the [Python 3 Wall of Superpowers](http://python3wos.appspot.com/).
xattr · Jan 6, 2014 · 003e967 · 003e967
1 parent 75b1858
commit 003e967
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/setup.py b/setup.py
@@ -37,6 +37,8 @@ def finalize_options(self):
 Operating System :: POSIX :: Linux
 Operating System :: POSIX :: BSD :: FreeBSD
 Programming Language :: Python
+Programming Language :: Python :: 2
+Programming Language :: Python :: 3
 Topic :: Software Development :: Libraries :: Python Modules
 """.splitlines()))