重构聚合根内存缓存的设计。
Refactory code.
重消息的序列化改为用json序列化
Merge remote-tracking branch 'remotes/tangxuehua/master'

Conflicts:
	src/ENode.EQueue/Commanding/CommandConsumer.cs
	src/ENode.EQueue/ENode.EQueue.csproj
	src/ENode/Configurations/Configuration.cs
	src/ENode/Domain/AggregateRoot.cs
	src/ENode/ENode.csproj