Proposal to replace redis as a dependeny

[BenKnigge]

Looking through the code I believe that the dependency on redis could be replaced by simply using a ConcurrentDictionary and optionally periodically dumping the in memory to mysql.

[BenKnigge]

@bonesoul If I were to implement this would it be something you would consider merging?

[bonesoul]

would be an interesting feature actually, we can get it in after getting communities ideas on it.