* Adapted use of widgetAddAccelerator
Regenerated Gui from glade sources
 * Added mnemonics for all menu entries
 * Regenerated GUI. Now we can actually browse the tree without using the
   shift key :-))
added Word[8,32] testcases
* Fixed embarrassing bug in compare... 8-P
* OS.Path cares for consistent volumes now, avoid Path exceptions.
* Fixed validVolume and made it more permissive.
* Canonical volumes are lower case.
* More tweaks to treat volumes correctly.
 * Do not warn about missing Config pickle
* First stake at documentation of toplevel GUI.
* Bring in exit again.
* Updated usage.
* Print file name with I/O errors.
* Add spaces so that column in error messages fits.
* Do tab expansion for line/column display, feeding, and jump-to-error.
* Updated.
 * Slightly different behaviour for quit: don't actually close any file
   but just test whether there's anything unmodified
 * History is saved as string list instead of record
 * Made history and configurations robust against erroneous (e.g. old)
   configuration pickles
 * Load all files that were still open when the gui was closed last time
 * Fixed some special cases. Explorer and Toplevel are now generated without warnings.
added Gen.word32
 * Renamed AliceXML to XML for consistency, moved signature to extra file