Added restfull api of mqtt config

Added restfull api of mqtt config

Upgrade the versions of the go-redis and raft

Upgrade the versions of the go-redis and raft

Buffer optimizations

Fixed #84

Missing OnPublishedWithSharedFilters in Hooks#HookBase.

add extension field for client

1.Add extension field for client
2.Upgrade versions of libraries such as raft

Fix failed test cases

The cluster supports shared subscriptions

1.The cluster supports shared subscriptions
2.Log display and other logical optimization

Add log output option of config

1.Add log output option of config.
2.Minimal optimization code.

Merge pull request #75 from asbjorn/patch-1

Update README.md

Update README.md