implement heartbeat scheduler using netty HashedWheelTimer, implement feature for heartbeat timeout
fix formatting
Fix condition
Fix typo
Either both synchronized or none
Update default timeouts
update log
Merge branch 'master' into improve_heartbeat_scheduler
remove heartbeatscheduler executor configurations
Remove synchronization in scheduler
Update changes.md
Merge pull request #16 from socketIo4Netty/improve_heartbeat_scheduler

implement heartbeat scheduler using netty HashedWheelTimer, implement fe...