Spreadsheet.py: added function get_xf_style() to return EasyXfStyle objects based on a HTML-like style specification for cell items, which are then applied to cells.
Spreadsheet.py: added function get_xf_style() to return EasyXfStyle objects based on a HTML-like
style specification for cell items, which are then applied to cells.

fw1121/genomics,fw1121/genomics,fw1121/genomics,fw1121/genomics,fw1121/genomics