code: function getYesNoResponse( promptStr, yesCb, noCb ) {
  		if ( noPrompt ) {
  			yesCb();
  			return;
  		}
  		inquirer.prompt([{
  			name: 'response',
  			type: 'confirm',
  			message: promptStr
  		}])
  		.then(function (answers) {
  		    if(answers.response){
  		    	yesCb();
  		    } else {
  		    	noCb();
  		    }
  		})
  		.catch(function(e){
  			grunt.fail.fatal('an error occurred: ', e);
  		});
  	}
docs: Prompts the user with prompStr.
  If user answers with anything !exists([yes, y, no, or n])
  
  @usage  grunt.log.writeln( {{yes/no question}} ), and call this
  function omitting promptStr
  
  @param  {function}  callback for if the user answers yes
  @param  {function}  callback for if the user answers no
  @param  {string}    what to ask the user. (defaults to 'Y/N?')
  @return {undefined} n/a