Brian Kelly

Task: add default event handler in task.shell()

2

Fixed the bug I ran into as detailed in this [thread](http://sourceforge.net/p/clustershell/mailman/clustershell-devel/thread/CAMD27Oi836s4Y8vQn6A3sSzrFipzasHhQ-hOw28hSJ26knCAgA%40mail.gmail.com/#msg34136205) from the mailing list.