Update IRedisClient.cs
Update IRedisClient.cs

add a method for scan command.
MindTouch/NServiceKit,MindTouch/NServiceKit,timba/NServiceKit,NServiceKit/NServiceKit,nataren/NServiceKit,timba/NServiceKit,MindTouch/NServiceKit,timba/NServiceKit,NServiceKit/NServiceKit,NServiceKit/NServiceKit,NServiceKit/NServiceKit,MindTouch/NServiceKit,nataren/NServiceKit,timba/NServiceKit,nataren/NServiceKit,nataren/NServiceKit