// original idea from blockloop: http://stackoverflow.com/a/24090733
app.directive('elastic', [
	'$timeout',
	function($timeout) {
		return {
			restrict: 'A',
			link: function($scope, element) {
				$scope.initialHeight = $scope.initialHeight || element[0].style.height;
				var resize = function() {
					element[0].style.height = $scope.initialHeight;
					element[0].style.height = "" + element[0].scrollHeight + "px";
				};
				element.on("input change", resize);
				$timeout(resize, 0);
			}
		};
	}
]);