Calculate earliest Kafka offset 2.Clear Uncommitted data 3.Clear commitlog.

Conflicts:
	src/main/java/com/neverwinterdp/scribengin/scribeconsumer/ScribeConsumer.java
	src/test/java/com/neverwinterdp/scribengin/ScribeConsumerRestartTest.java
	src/test/java/com/neverwinterdp/scribengin/fixture/KafkaFixture.java
	src/test/java/com/neverwinterdp/scribengin/fixture/ZookeeperFixture.java
Reverted Zookeeper Fixture.
Merge pull request #41 from DemandCube/issue353b

Issue353b
merging with master