增加lixian-portal的链接

lixian-portal是我对此cli工具做的一个webui包装（只包装了俺所需的特定场景需要的功能）

它仅仅能完成

* 把bt或者其他类型任务添加到迅雷离线下载
* 等迅雷离线下载完后自动取回
* 取回完后自动删除任务

希望能服务到大家
Merge pull request #282 from layerssss/patch-1

增加lixian-portal的链接
upgrade response check
skip response check, since it often fails...
Added https support
Merge pull request #302 from LeeroyDing/https

Added https support
minimal verification code support
sometimes server returns ({"rtcode":-1,"list":[]}), add retry
encode file path safely
Merge branch 'master' of github.com:iambus/xunlei-lixian
fix verification code capitalization
ignore BOM
update README with thanks to synology
increase .torrent file size to 2M
set retry log level to debug
increase retry count to 10
lx download --node=vod1
fix #326: gzipped torrent file