Add explicit jets3t dependency, which is excluded in hadoop-client
Fix HDFS access bug with assembly build.

Due to this change in HDFS:
https://issues.apache.org/jira/browse/HADOOP-7549

there is a bug when using the new assembly builds. The symptom is that any HDFS access
results in an exception saying "No filesystem for scheme 'hdfs'". This adds a merge
strategy in the assembly build which fixes the problem.
fix run-example script
Merge pull request #921 from pwendell/master

Fix HDFS access bug with assembly build.
better expression
Merge pull request #923 from haoyuan/master

fix run-example script
SPARK-894 - Not all WebUI fields delivered VIA JSON
Merge pull request #925 from davidmccauley/master

SPARK-894 - Not all WebUI fields delivered VIA JSON
Change port from 3030 to 4040
Merge pull request #922 from pwendell/port-change

Change default port number from 3030 to 4030.
Merge pull request #919 from mateiz/jets3t

Add explicit jets3t dependency, which is excluded in hadoop-client
Changed localProperties to use ThreadLocal (not DynamicVariable).

The fact that DynamicVariable uses an InheritableThreadLocal
can cause problems where the properties end up being shared
across threads in certain circumstances.
Updated Spark on Mesos documentation.
More updates to Spark on Mesos documentation.
Merge pull request #927 from benh/mesos-docs

Updated Spark on Mesos documentation.
Merge pull request #926 from kayousterhout/dynamic

Changed localProperties to use ThreadLocal (not DynamicVariable).
Add git scm url for publishing
Use different Hadoop version for YARN artifacts.

This uses a seperate Hadoop version for YARN artifact. This means when people link against
spark-yarn, things will resolve correctly.
Merge pull request #929 from pwendell/master

Use different Hadoop version for YARN artifacts.
Explain yarn.version in Maven build docs