update instructions, avoids no such table: django_digest_partialdigest during syncdb
redirect to attachment url, briefcase attachment downloads should be work as expected
update test to reflect expected redirect
Merge pull request #1142 from modilabs/original-image-download

Allows attachments to be downloaded properly by ODK Briefcase
skip enketo test incase we get not allowed msg from enketo server
pep8
Merge pull request #1144 from modilabs/enketo_test_skip

Enketo test skip
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
for s3 export downloads, redirect to s3 url. For large exports, they will not be affected by nginx timeouts
Merge pull request #1148 from modilabs/exports_redirect_s3

for s3 export downloads, redirect to s3 url.