Copytext

-----

* Properly serialize rows with keys, but not values.

-----

* Skip header row when iterating over rows in a sheet.

-----

* Fixes for Markup handling.

-----

* Support null checking on cells. (15)
* Integrate markupsafe and elminate cell_class_wrapper.
* Errors and rows can now test false. (14)

-----

* First draft of docs. (4)
* Explicit handling of fields with dates/numbers. (8)
* Tests for unicode support. (1)

-----

* Initial import.