1.13

* Fixed bug in Term::Screen where partial function key escape
  sequences were added to the wrong end of the input buffer.
* Added flash() to send visual bell
* Changed raw() and cooked(): they no longer call echo() and
  noecho().

1.12

* Added bold2esc(), reverse2esc(), underline2esc(), normal2esc()
* Changed: underline() can no longer be turned off with
  colorizable(); underscore() can.

1.11

* Fixed bug in Term::Screen where getch() would cause keypresses
  to become hidden from the application (replaced getc() with
  sysread()).
* Added timeout so that Escape does not have to be pressed twice.
* Added raw() and cooked() for convenience.