extend = function (defaults, options) {
		var extended = {};
		forEach(defaults, function (value, prop) {
			extended[prop] = defaults[prop];
		});
		forEach(options, function (value, prop) {
			extended[prop] = options[prop];
		});
		return extended;
	}
Merge defaults with user options
@private
@param {Object} defaults Default settings
@param {Object} options User options
@returns {Object} Merged values of defaults and options