modifed the way it handles. now it receives a replicate tag and makes the modification from the payload
Merge branch 'master' of https://github.com/tudorgk/PCSD

Conflicts:
	assignment-4/acertainbookstore/src/com/acertainbookstore/business/CertainBookStoreReplicationTask.java
	assignment-4/acertainbookstore/src/com/acertainbookstore/business/CertainBookStoreReplicator.java
	assignment-4/acertainbookstore/src/com/acertainbookstore/server/SlaveBookStoreHTTPMessageHandler.java