Define path for static files

Issue #605
Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/settings_example.py

@@ -146,7 +146,7 @@ MEDIA_URL = '%s/media/' % URL_PREFIX
 # Don't put anything in this directory yourself; store your static files
 # in apps' "static/" subdirectories and in STATICFILES_DIRS.
 # Example: "/home/media/media.lawrence.com/static/"
-STATIC_ROOT = ''
+STATIC_ROOT = os.path.join(DATA_DIR, 'static')
 
 # URL prefix for static files.
 # Example: "http://media.lawrence.com/static/"