when attachment is missing

Update metadata.txt

Increase default sync time to 1 day

Removing unnecessary imports

This is done to avoid dependency on third party libraries in pyxform.
'unicodecsv' and 'xlrd' is no more required

Update for Release 3.9.6

Update metadata.txt

update metadata to releae 3.9.3

Experimental Release

Release 3.8

Update metada for release

Support for Date field