Added exception to shutdown program if keyboard intterupt is encountered.
Added exception to shutdown program if keyboard intterupt is encountered.

wiesener/quickbot_bbb,o-botics/quickbot_bbb,kohloderso/quickbot_bbb,edwarod/quickbot_bbb,Felldown/bbb,Felldown/bbb,o-botics/quickbot_bbb,jadonk/quickbot,wiesener/quickbot_bbb,kohloderso/quickbot_bbb,edwarod/quickbot_bbb,chenxinzzu/quickbot_bbb,chenxinzzu/quickbot_bbb,jadonk/quickbot