ThreadPool for Kafka Producer

- kafka_2.9.2-0.8.1.1 upgraded
- threadpool created for kafka producing
Merge pull request #59 from metacret/ISSUE-57

ThreadPool for Kafka Producer
Merge pull request #58 from elandau/master

SuroClientModule need not be a private module
http://blog.joda.org/2014/02/turning-off-doclint-in-jdk-8-javadoc.html
Merge pull request #62 from thinker0/master

#61 http://blog.joda.org/2014/02/turning-off-doclint-in-jdk-8-javadoc.html
instead of static port numbers, pickPort using ServerSocket(0) is used
Merge pull request #64 from metacret/ISSUE-63

instead of static port numbers, pickPort using ServerSocket(0) is used
mistakenly incomplete unit test case is committed
[Gradle Release Plugin] - pre tag commit:  '0.2.4'.
[Gradle Release Plugin] - new version commit:  '0.2.5-SNAPSHOT'.
[Gradle Release Plugin] - pre tag commit:  '0.2.5'.
[Gradle Release Plugin] - new version commit:  '0.2.6-SNAPSHOT'.
MessageWritable

- MessageWritable is wrapping Message with Writable interface
- SequenceFile writes MessageWritable instead of Message
- LocalFileSink's default file rolling configuration 1 minute -> 2 minutes, 100 MB -> 200 MB
Merge pull request #67 from metacret/ISSUE-66

MessageWritable
suro-kafka dependency unnecessary from suro-server
suro-kafka dependency is moved from suro-client to suro-server
Merge pull request #69 from Netflix/ISSUE-45

Issue 45
ConnectionPool population.await with timeout
Merge pull request #70 from metacret/ISSUE-68

ConnectionPool population.await with timeout
StatusServer entry point changed

- /healthcheck to /surohealthcheck
- /sinkstat to /surosinkstat