[plt-scheme] 205.2

The exp-tagged code in CVS for MzScheme and MrEd is now version 205.2.

Changes:

 * Added an argument to font%'s constructor to indicate that the font's
   size should be interpreted as pixels (more precisely,
   drawing-context units) instead of points. The default is still to
   interpret the size as points (or at least what the OS claims to be
   points).

 * Added a 'hide-menu-bar style for frame%, which does the obvious
   thing under Mac OS.

 * The initial location for a frame% or dialog% can use negative
   numbers, and the `move' method can move a frame/dialog to a negative
   location.

 * Added an optional argument to `get-display-size' to get the entire
   screen's size under Windows and Mac OS

 * Added `get-display-left-top-inset' to report the space taken by
   the menu bar or task bar.

 * Slideshow's rendering is now much more consistent across platforms
   and display sizes.

Matthew