renamed split_select_multiples to all upper
field delimiters
infinitely nested xls export without pandas
removed generate_zip_csv_export def and merged with global generate_export
added a check for request NOT to split select multiples
update parent table names when a different name is generated to keep it valid for xls(x)
Fixed select multiples to expect space sep. not comma sep.; renamed extra fields to match our current names;
fixed tests
Merge pull request #1145 from modilabs/pandaless_export

XLS export without using pandas