Add Slovenian classifier

setup.py

@@ -64,6 +64,7 @@ setup(name='trytond_purchase_invoice_line_standalone',
         'Natural Language :: French',
         'Natural Language :: German',
         'Natural Language :: Russian',
+        'Natural Language :: Slovenian',
         'Natural Language :: Spanish',
         'Operating System :: OS Independent',
         'Programming Language :: Python :: 2.6',