Head command completed & created new main file HeadClient for it.
Tail command complted & created main in TailClient for it
Uniq command complted & created main in UniqClient for it
used instance of class to call methods in WCClient
used instance of class to call methods in HeadClient
created main mathod for ReduceSpaces in ReduceClient
used instance of class to call methods in TailClient
used instance of class to call methods in UniqClient
Cut method completed with main method in CutClient
Class name changed from File to FileOperations
minor changes