streamlined the "working..." status handling and added an example
Merge pull request #202 from niphlod/enhancement/working_status

streamlined the "working..." status handling and added an example
Update validators.py

Updated the IS_DATETIME validator; otherwise it would fail when creating a new record with SQLFORM, for dates that have an empty default.
Merge pull request #203 from lucadealfaro/master

Update validators.py
reverted previous patch
removed unwanted print statement, thanks Luca