TODO list for Perl distribution Excel::Template

- Add colspan (COL), rowspan (ROW), width (CELL), and height (ROW)
- Anything else people suggest

Missing S::WE features:
  Workbook
    set_tempdir
    add_char_ext
    set_custom_color
    set_1904
    set_codepage
  Worksheet
    write_unicode/write_unicode_le
    write_url_range
    write_comment
    activate/select/set_first_sheet
    set_selection
    outline_settings
    thaw_panes
    merge_range
    set_zoom
  Page Setup
    set_landscape/portrait
    set_paper
    center_horizontally/center_vertically
    set_margins
    set_header/set_footer
    repeat_rows/repeat_columns
    hide_gridlines
    print_row_col_headers
    print_area
    fit_to_pages
    set_print_scale
    set_v_pagebreaks/set_h_pagebreaks
  Formats
    colors
    Support for builtin formats
    set_center_across
    set_text_wrap
    set_rotation
    set_indent
    set_shrink
    set_text_justlast
    set_pattern
    set_bg_color
    set_fg_color
    set_border
    set_border_color
    user-defined formats
  Outlines / Grouping
    for rows
    for columns
  Handling for maximums
    Maximum number of chars in a string  32767
    Maximum number of columns            256
    Maximum number of rows               65536
    Maximum chars in a sheet name        31
    Maximum chars in a header/footer     254
