function isString( value ) {
	return ( isPrimitive( value ) || isObject( value ) );
}
Tests if a value is a string.

@param {*} value - value to test
@returns {boolean} boolean indicating whether value is a string

@example
var bool = isString( new String( 'beep' ) );
// returns true

@example
var bool = isString( 'beep' );
// returns true