readding
.
Restoring contents to be the same as before Robby\'s fix to the cvs.
- added much of mzscheme to frtime.ss
- added much of mzlib's list.ss to list.ss
- generally cleaned things up
- more additions and fixes
- vectors should work properly, and without repeated allocation
  (except for delay)
- "-=>" is now syntax, so the "constant" expr isn't evaluated until the
  event actually occurs
- demo6 reflects the enhancement to -=>
- numerous extensions and thorough clean-up
signalized version of (lib "etc.ss")
(initial version)
mostly bug fixes
made 'vector' more efficient
- added synchronous events to manager
- added checkbox widget to GUI
- converted alarm queue to use heap
- various bug fixes and improvements
- schedule-alarm
fixed bug involving lists/switch/value-now (cons-copying version)
- now provide "frtime-version"
- fixed bug in 'vector'
- moved old version of vector back to check whether optimized version
  has a bug
- fixed display of signals in error messages
- fixed bug in optimized 'vector' implementation
- experimental: exceptions raised during evaluation of signals
  reflect continuation marks present at signal-creation time;
  this means we can get an appropriate backtrace in DrScheme

raise-exceptions (cell) : set to true/false signal to control raising
  of exceptions
- various bug fixes and enhancements
- fixed documentation
- added snapshot macro
- gave demos meaningful names
- removed unused treap implementation
- renamed gui.scm to gui.ss
- gave gui demos meaningful names
- renamed other demos, added robb's demos