Add install date to win32ui

This adds the install date to the lower right status area in the
win32ui. It also gets rid of the sizegrip that was getting added
by the status data area. It gave the impression that the window
could be resized which it can't. It also took up space in the
status area.
Merge pull request #98 from awiddersheim/fix_win32ui_install_date

Add install date to win32ui