TextConsole is no more.  TextTerminal only, now.  Bug fix pending.
Several only-marginally-helpful edits to yoob.TextTerminal.
drawElement -> drawCell (in PfCanView); keypress/keyup ordering!
Fix REPL demo.
Indent less badly.
Don't allow backspace if no text entered.
PlayfieldCanvasView for a terminal shouldn't try to window around.