removed document on zeromq

docs/zeroMQ-intro.md

----
-layout: global
-title: ZeroMQ Stream setup guide
----
-
-## Install ZeroMQ (using JNA)
-
-To work with zeroMQ, some native libraries have to be installed.
-
-* Install zeroMQ (release 2.1) core libraries. [ZeroMQ Install guide](http://www.zeromq.org/intro:get-the-software)
-
-   Typically if you are using ubuntu 12.04, you can do:
-
-    `$ sudo apt-get install libzmq1`
-
- __To work with akka-zeromq, zmq 2.1 version is supported via [JNA](https://github.com/twall/jna). Incase you want to switch to zeromq 3.0, please install [JZMQ](http://www.zeromq.org/bindings:java) which uses [JNI](http://docs.oracle.com/javase/6/docs/technotes/guides/jni/) and drop in jzmq jar__
-
-## Sample scala code
-
-A publisher is an entity assumed to be outside the spark ecosystem. A sample zeroMQ publisher is provided to try out the sample spark ZeroMQ application.
-
-1. Start the sample publisher.
-
-{% highlight scala %}
-
-
-      val acs: ActorSystem = ActorSystem()
-
-      val pubSocket = ZeroMQExtension(acs).newSocket(SocketType.Pub, Bind(url))
-
-      pubSocket ! ZMQMessage(Seq(Frame("topic"), Frame("My message".getBytes)))
-
-
-
-{% endhighlight %}
-
-A typical zeromq url looks like `tcp://<ip>:<port>`
-
-It does nothing more than publishing the message on the specified topic and url.
-
-2. Start the spark application by plugging the zeroMQ stream receiver.
-
-{% highlight scala %}
-
-    val lines = ssc.zeroMQStream(url, Subscribe(topic), bytesToObjectsIterator)
-
-{% endhighlight %}
-
-bytesToObjectsIterator is going to be a function for decoding the Frame data.
-
-_For example: For decoding into strings using default charset:_
-
-
-{% highlight scala %}
-
-
-    def bytesToStringIterator(x: Seq[Seq[Byte]]) = (x.map(x => new String(x.toArray))).iterator
-
-{% endhighlight %}