When reading an Xlsx file using a ReadFilter it is posible for
`ColumnAndRowAttributes::load()` to (I think) erroneously skip loading
of column or row attributes.
This is because `isFilteredColumn` and `isFilteredRow` will return early
with a true (ie the column or row should be considered filtered and
their attrbutes discarded) at the first false returned from the
ReadFilter. All rows for a column must past the filter for the loop to
return false. I've also created the same test of column widths for row
heights.
* ColumnWidthTest.php
Added test with a read filter.
* RowHeightTest.php
Mirrored column wdith tests for row height
Alex Wright