Deleted old main.js entry
Removing redis folder
Replace logger from winston to node-simple-logger
[Fix] Missing self for stop method
[minor] Update log messages
[fix] Problems executing redis-cli
Added process SIGINT for stopping redis
[fix] stopping redis one time only if started
[api] function for stop previous running redis

Added a function for checking if a redis instance is started or not when
we start redis by node. It allows to stop this previous instance.