build index with unicode format

[ryandonglin]

Hi, jprante. Recently i used your elasticsearch-river to build index for mysql data, while building index, there was a column which format is blob data, and hens i add following configuration in my jdbc configuration: "treat_binary_as_string":true, I am not sure where there is something with my configuration of import.sh or bat file,but the indexes i built for mysql are represented in unicode format, what should i do with that?