csv compatibility

tablib/compat.py

@@ -27,6 +27,7 @@ if is_py3:
     from tablib.packages import openpyxl3 as openpyxl
     from tablib.packages.odf3 import opendocument, style, text, table
 
+    import csv
     # py3 mappings
 
     unicode = str
@@ -42,4 +43,6 @@ else:
     from tablib.packages import openpyxl
     from tablib.packages.odf import opendocument, style, text, table
 
+    from tablib.packages import unicodecsv as csv
+
     unicode = unicode