1.5.5

1.5.4

Merge pull request #955 from redHJ/pandoraSend

pandora sender add map[string][string] to jsonstring

Merge pull request #935 from redHJ/sqlFix

fix sql panic

Merge pull request #918 from wonderflow/tools

add charset converter

Merge pull request #896 from wonderflow/op1

es type变为高级选项 && 去除tsdb选项

Merge pull request #807 from wonderflow/fixa1

remove one line

Merge pull request #797 from redHJ/fixDirxRead

fix dirx can't read data when one match dir is empty

Merge pull request #780 from redHJ/schemaConvert

schema非法字符转换

Merge pull request #738 from redHJ/diskSize

1. 增加选项：磁盘使用总大小限制和写入磁盘的单条数据大小限制 2. 调整reader顺序