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TODO for 1.5 or later release

21. Import and export standard XML (replace <br/>, '<', '>', space).
23. Preference panel: 
    - Default font size.
    - State of calendar view when starting up.
24. Float panel for page list and file manager.
24.1 Change links when file name is changed in panel of file manager.
28. Better search result or search panel.
29. Open window when double click on icon of title (the same as in iTune).
30. preview tag or inspector panel.
31. enable and disable menus according to selection.
34. Validate MWK DTD.
35. Documentation.
36. Handle NSException when tags are not validated

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Not sure

a. Font size
b. color
e. Allow format tag in <note>, <caution> and <information>
f. how to call GNUMail or Mail.app with email address ?
g. Ask file to be saved before using <file> tag.
h. Allow format tag in tags such as <link> ?
i. Selectable text in <note>, <caution>, <information>
j. Specify attribute in rich text mode instead edit mode (WYSIWYG). 
k. Import VooDooPad xml
l. Change "edit" button to other function for special page (Search, Journal).

====================
Known or potential bug

1. The [Back] and [Forward] may not work properly even though 
   it happens rarly. Unable to reproduce it yet.
2. Automatically replacing link when title of page changes
   does not test throughly, even though there is no known bug yet.
3. '>>' and '<<' is not tested throughly
7. Journal is not well tested.

GNUstep-specific

4. Link is in blue color, but has no underline.
5. Drag from GWorkspace doesn't work.
6. Cursor won't follow the drop position.
