Investigate using CSS styles for minimum row/column heights/widths instead of  

[cbailiss]

Add an option (either a new default, or a parameter in getHtml(), saveHtml, renderPivot(), etc) to prevent all non-breaking space characters from being emitted and will more properly use CSS style rules instead to control minimum row heights and minimum column widths.

[cbailiss]

Create a new theme with min heights/widths, make that the default, keep the old theme under a different name for compatibility

[cbailiss]

Need to test with different combinations of zero/non-zero cell padding/spacing, as that may be when cells with no value are rendered differently.