Log Message:
update to 0.96.1
changes:
* Text rendering is now based on the TextLine objects, each of which
  contain one line of text along with font and font height.  This has
  allowed proper control of text width and speedier rendering.
* Visio VXD files can now be imported and exported, thanks to Ian
  Redfern.
-internal API changes
* A number of new keyboard shortcuts.
* Layer visibility is now undoable.
* New sheets for Business Process Modelling
-bugfixes