move of setCurrentDb
remove old purgeStatic var
add a function to empty dead or alive redis arrays
on DB only one server is authorised
exception message
first attempt to send multiple command on redis (non consistent)
Add argument serverRank to redis\DB::getRedisObject()
Add exception in case of no server available in Multi::onOneRandomServer()
Update README for the Multi class
README change
Merge pull request #3 from M6Web/feature/multi-redis

Feature/multi redis