* Add management tools
  - Glyph viewer and editor
  - Meta data editor

* Consider about ABI stability.
* Consider about portability.

* TomoeWindow
  - Menu (GtkAction)
  - Plural canvas like zaurus
* TomoeCanvas
  - Preferences for lines:
    = Width and color of handwrited lines
    = Width, color, and type of normalized lines
    = Width, color, and type of ruled lines
  - Glyph editing mode
* TomoeCharTable
  - Font and color preference
  - Add popup window for displaying additional informations
  - Suppport multiple rows and columns
  - Page switching, add Up and Down button
  - Mouse wheel support
* Mode
  - ASCII only mode.
  - Hiragana only mode.
* Gesture
* etc etc...
