-------------------
- Added function Utils.rowcol_pair_to_cellrange.
``(0, 0, 65535, 255) -> "A1:IV65536"``
- Removed :class:`Worksheet` property ``show_empty_as_zero``,
and added attribute :attr:`~Worksheet.show_zero_values`
(default: ``1 == True``).
- Fixed formula code generation problem with formulas
including MAX/SUM/etc functions with arguments like A1+123.
- Added .pattern_examples.xls and put a pointer to it
in the easyxf part of Style.py.
- Fixed Row.set_cell_formula() bug introduced in 0.7.1.
- Fixed bug(?) with SCL/magnification handling causing(?) Excel
to raise a dialogue box if sheet is set to open in page preview mode
and user then switches to normal view.
- Added color and colour as synonyms for font.colour_index in easyxf.
- Removed unused attribute Row.__has_default_format.