Highlights:
------------------
1. Mature yarn integration, integrate the gearpump UI into yarn. (#735)
2. Better metrics UI, better charts, application clock visualization, task level skew analysis (#662)
3. add a storm connector to allow user to run arbitrary storm jar(#676)
4. Add a kafka-hbase pipeline example (#400)
5. Better Client API. user can now write application like this: (#716)
  ```scala
    val partitioner = new HashPartitioner()
    val split = Processor[Split](splitNum)
    val sum = Processor[Sum](sumNum)
    val app = StreamApplication("wordCount", Graph[Processor[_ <: Task], Partitioner](split ~ partitioner ~> sum), UserConfig.empty)
   
   val context = ClientContext()
   val appId = context.submit(application(config))
   context.close()
  ```
6. Add HBase sink.(#701)
7. support a experiment DSL (#28)
   ```scala
       val context = ClientContext()
    val app = new StreamApp("dsl", context)

    val data = "This is a good start, bingo!! bingo!!"
    app.fromCollection(data.lines.toList).
      // word => (word, count)
      flatMap(line => line.split("[\\s]+")).map((_, 1)).
      // (word, count1), (word, count2) => (word, count1 + count2)
      groupBy(kv => kv._1).reduce((left, right) => (left._1, left._2 + right._2)).
      // print the word count in log files
      log()

    val appId = context.submit(app)
    context.close()
   ```

8. Support an unmanaged message handle, allow to query any task for in memory state (#680)
9. add UI for stock crawler example(#666)

Change List:
----------------
 - #716, Refine the user interface. improve the user interface, like Application, Processor
 - #755, fix Build breakage, 
 - #729, remove argument '-master' in command line option, use gear.conf instead.
 - #713, provide an option to read from beginning of a topic 
 - #746, support state clock for task so that we can retrieve the state timestamp
 - #744: fix several metrics issues
 - #638, Use Subscription to link two processor
 - #662, [UI] added processor  details tab
 - #735, [yarn]Launch UI in the same container of Yarn AppMaster container.
 - #732: [UI]add more charts and add more metrics to dag
 - #731 rename TaskDescription to ProcessorDescription
 - #708, fix storm connector config classpath 
 - #722: [UI]use different color and opacity for edges
 - #708, allow user to pass in a customized storm config
 - #709: [UI]npe when streaming dag is not initialized
 - #704, DAG processor name is "undefined" if "description` field of TaskDescription is not defined
 - #706, Remove example jars from gearpump built-in classpath.
 - #701 add a HBase sink
 - #28, add an experiment module to support a very basic flatmap dsl
 - #666, add UI for stock crawler example
 - #691: [UI] fix metrics
 - #680, add a service in appmaster to support query of task actorRef
 - #210, allow easier remote debugging executor process
 - #666, add a stock index crawler example,
 - #658 make config of Gearpump on Yarn configurable
 - #676, add a storm connector to allow user to run arbitrary storm jar
 - #657, remove unnecessary yarn deps
 - #672, extend Task to support unmanaged messages so that every task can serve as full functional service
 - #670, fix yarn application path and log path
 - #665, Add scheduleOnce interface in TaskContext