[plt-scheme] 370.6

MzScheme and MrEd are now version 370.6 in the SVN repository trunk.

The changes are related to Caps Lock modifier handling, and the overall
effect is that more keybindings (e.g., menu shortcuts) should now work
right for Mac OS X and X11 when Caps Lock is on.

Changes:

 * Key and mouse events now report whether the Caps Lock key was on.

 * Under Mac OS X, the Caps Lock modifier is ignored when getting the
   key code for an event that includes Control or Command.

 * Under X, the the Caps Lock modifier is ignored when getting the key
   code for an event that includes Control without Alt.

 * Key events have a `get-other-caps-key-code' method to report
   alternate key code where Caps Lock has its opposite state.


Matthew