Created on Mar 13, 2014
@author: Derek Wood
Ask a yes/no question via raw_input() and return their answer.
question¶ – String that is presented to the user.
default¶ – The presumed answer if the user just hits <Enter>. It must be “yes” (the default), “no” or None (meaning an answer is required of the user).
"no". (The _sphinx_paramlinks_bi_etl.utility.ask.yes_no."answer" return value is one of "yes" or)