BUGS

Known bugs (let me know if you can fix these, or have some insight):

* Screen corruption occurs occasionally, caused by the scrolling.  I think
  the bug is in Screen::refreshTTY(), but that code is somewhat opaque.
*** Fixed?

* Sometimes the client will "hang".  It seems like it's blocking on I/O
  or something.  Looking at CPU usage it will jump to 100%, but client
  will return to normal after a few seconds.
*** Fixed?

* Window system does not properly keep parent/child relationships.  This is
  most visibly by typing /help, which will cause dirt to crash because it
  tries to use one of these bad parent/child pointers.  Some routines should
  be written to test the consistency of the Window object's parent/child, 
  prev/next pointers.

* Keypresses are delayed by one key.  (i.e. you have to press pgup twice to
  begin scrolling) Keypress work is not finished.