setup.py: Exclude benchmark directory from the install

Author: ales-erjavec

setup.py

@@ -172,7 +172,7 @@ def write_version_py(filename='Orange/version.py'):
         a.close()
 
 
-PACKAGES = find_packages()
+PACKAGES = find_packages(include=("Orange.*",))
 
 # Extra non .py, .{so,pyd} files that are installed within the package dir
 # hierarchy