Update README.md

Update README.md

* Update homepage link from http://zeppelin-project.org to http://zeppelin.incubator.apache.org
* Update github repo address from https://github.com/NFLabs/zeppelin to https://github.com/apache/incubator-zeppelin
* Update travis ci build status image address
* Update tracking link

Ready to merge.

Author: Lee moon soo <[email protected]>

Closes apache#9 from Leemoonsoo/update_readme and squashes the following commits:

5dee563 [Lee moon soo] Update homepage address, travis build image link, tracking code

README.md

@@ -1,10 +1,10 @@
 #Zeppelin 
 
-**Documentation:** [User Guide](http://zeppelin-project.org/docs/index.html)<br/>
+**Documentation:** [User Guide](http://zeppelin.incubator.apache.org/docs/index.html)<br/>
 **Mailing List:** [User and Dev mailing list](http://zeppelin.incubator.apache.org/community.html)<br/>
-**Continuous Integration:** [![Build Status](https://secure.travis-ci.org/NFLabs/zeppelin.png?branch=master)](https://travis-ci.org/NFLabs/zeppelin) <br/>
-**Contributing:** [Contribution Guide](https://github.com/NFLabs/zeppelin/blob/master/CONTRIBUTING.md)<br/>
-**License:** [Apache 2.0](https://github.com/NFLabs/zeppelin/blob/master/LICENSE)
+**Continuous Integration:** [![Build Status](https://secure.travis-ci.org/apache/incubator-zeppelin.png?branch=master)](https://travis-ci.org/apache/incubator-zeppelin) <br/>
+**Contributing:** [Contribution Guide](https://github.com/apache/incubator-zeppelin/blob/master/CONTRIBUTING.md)<br/>
+**License:** [Apache 2.0](https://github.com/apache/incubator-zeppelin/blob/master/LICENSE)
 
 
 **Zeppelin**, a web-based notebook that enables interactive data analytics. You can make beautiful data-driven, interactive and collaborative documents with SQL, Scala and more.
@@ -14,7 +14,7 @@ Core feature:
    * Built-in Apache Spark support
 
 
-To know more about Zeppelin, visit our web site [http://zeppelin-project.org](http://zeppelin-project.org) 
+To know more about Zeppelin, visit our web site [http://zeppelin.incubator.apache.org](http://zeppelin.incubator.apache.org)
 
 ## Requirements
  * Java 1.7
@@ -116,7 +116,4 @@ Zeppelin comes with a set of end-to-end acceptnce tests driving headless seleniu
       mvn verify -P using-packaged-distr
 
 
-[![githalytics.com alpha](https://cruel-carlota.pagodabox.com/10ba60fb64e53bb1ccd0bab47abbcc4a "githalytics.com")](http://githalytics.com/NFLabs/zeppelin)
-
-
-
+[![Analytics](https://ga-beacon.appspot.com/UA-45176241-4/apache/incubator-zeppelin/README.md?pixel)](https://github.com/igrigorik/ga-beacon)