Angular Module for handing key events
examples:
<textarea kf-init kf-ctrl-s="SomeSaveFunction()"></textarea>
<textarea kf-init kf-enter="EnterPressed()"></textarea>
<input type="text" kf-init kf-a="KeyAPressed()" />
<input type="text" kf-init kf-alt-b="AltBPressed()" kf-2="Number2Pressed()" kf-shift-5="Shift5Pressed() />