Handled Replica Failures.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	bin/AliveMessage.class
	bin/Commander.class
	bin/Replica.class
	src/Commander.java
	src/PaxosMessage.java
	src/Replica.java
Merge remote-tracking branch 'upstream/master'

Conflicts:
	bin/AliveMessage.class
	bin/FailureDetectMessage.class
	bin/ReadOnlyDecisionMessage.class
	bin/ReadOnlyPreemptedMessage.class
	bin/ReadOnlyProposeMessage.class
	bin/Replica.class
	src/Replica.java
Merge pull request #3 from harshhpareek/master

Merged Replica Failure detection code and miscellaneous small changes