* [Update] clean code

* [Bugfix] Fix bugs and add more log info msgs (#105)

* fix SecureFX SFTP connection issues (#99)

* echo CORE_HOST value when jms_core not ready (#101)

* increase timeout seconds (#102)

* Add log info messages

* support tcp proxy (#72)

* fix selected item display bug

* [Update]add ssh keep-alive

* Fix MFA login http response error

* [update] update new core API (#76)

* fix docker config from env (#77)

* V52 bugfix (#78)

* fix select all item display bug

* fix js bugs

* 修复关闭seesion的bug和移除无效的配置 (#80)

* [Update] add asset load policy config

* modify readme

* [Update] 修改url

* [update]fix selecting asset bugs

* [update]修改websftp的js翻译

* 修改debug信息

* 修改连接复用

* 支持文件夹下载

* fix bugs

* upgrade jquery related files

* add zipMaxSize and zipTmpPath config

* remove debug code

* 优化复用连接代码

* 修改配置, 并移除无效的配置项

* 修复网域连接未释放问题

* 修复语言设置无效的问题

* 修复最后一个命令记录问题 (#85)

* update elfinder

* fix bugs

* add protocol field for session

* version to 1.5.3