Added splitext

Integrated with stdwinq.

Keyboard focus policy
more?

Keyboard interface

minsize --> getminsize.
Added 'boxed' option.
Added lost of code to realize (?)

Added keyboard downcalls.
(I mean keyboard focus policy and activate/deactivate)

Changed minsize to getminsize.

Added altgetmatrix (better but incompatible).

*** Somehow the call to printobject was changed back to fwrite?!?! ***

call dict2lookup insteead of dictlookup.

Lots of small bugfixes (lint!).
Made bgn_group and end_group form methods instead of top-level functions.