Document some changes in txredis_manager.
Document some changes in txredis_manager.

vishwaprakashmishra/xmatrix,TouK/vumi,harrissoerja/vumi,TouK/vumi,harrissoerja/vumi,vishwaprakashmishra/xmatrix,vishwaprakashmishra/xmatrix,TouK/vumi,harrissoerja/vumi