0.3
===
  - Added support for scaling icons and columns with the font changes.
  - Added two new icons.

0.2
===
  - Added a Refresh function to handle font changes.  (There is currently
    no support for binding to a Tk::Font object.)
  - Fixed -font support.

0.1
===
  - Added icon support for having a "marked" column.
  - Started modules to create a custom multi-column listbox in a canvas with
    scrollbars and adjustable width columns.
