allow more characters in setup file names

import_csv.py

@@ -188,7 +188,7 @@
     # files need to be named according to the following regexp
     pattern = re.compile(
         r'(?P<path>.*/)'
-        r'(?:\d+\s)?'
+        r'(?:[\d\s\w_-]*\s)?'
         r'(?P<model>[\w.]+?)'
         r'(?:@(?P<lang>\w{2,3}(?:@latin|_\w{2})))?'
         r'(?:.csv)?'