- save geometry if necessary

- fix "move" menu item

- toggling windowed mode makes the window jump (sawfish and metacity) 
	to 0,0

- check for image file existence before loading, popup window if not found

- create a blank digit, for later functionality including 
	12 hour mode with no leading 0

- add seconds display (toggle between "hh:mm" and "  :ss"? periodically?)

- always-on-top option

- add man page

- general glibification and platform-independence

- allow to change the look & feel on the fly? 

- make scale factor selectable by command-line option, overriding
	gtubeclock.settings value
