* Add exceptions SmartsheetHTTPClientError and SmartsheetHTTPServerError
0.1.10
* Change models.extra.AutoNumberFormat to support absent arguments [7](https://github.com/dmfigol/simple-smartsheet/issues/7) * Handle invalid values in dates and datetimes columns [9](https://github.com/dmfigol/simple-smartsheet/issues/9)
0.1.9
* Add workspace to SheetSchema [6](https://github.com/dmfigol/simple-smartsheet/issues/6) * Handle missing "name" in contact options [5](https://github.com/dmfigol/simple-smartsheet/issues/5)
0.1.8
* Fix contactOptions in ColumnSchema [4](https://github.com/dmfigol/simple-smartsheet/issues/4)
0.1.7
* Change default sorting order to ascending [3](https://github.com/dmfigol/simple-smartsheet/issues/3)