修改log

‘’‘用法’‘’
        $log = \mushroom\component\Log::create(array('path' => '/tmp/data.txt'));
        $log->log('info', 'this is a demo'); 
--------------------------------------------------
‘’’修正错误‘’‘
        File 文件  直接以文件名创建目录
‘’‘修改文件’‘’
        File  文件  增加追加写功能