Merge branch 'reorgscripts' into scripts-reorg

assembly/src/main/assembly/assembly.xml

bin/pyspark

bin/pyspark.cmd

bin/pyspark2.cmd

bin/run-example

bin/run-example.cmd

bin/run-example2.cmd

bin/spark

bin/spark-shell

bin/spark-shell.cmd

...scala/org/apache/spark/deploy/worker/ExecutorRunner.scala

...scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala

...spark/scheduler/cluster/mesos/MesosSchedulerBackend.scala

.../main/scala/org/apache/spark/ui/UIWorkloadGenerator.scala

core/src/test/scala/org/apache/spark/DriverSuite.scala

data/kmeans_data.txt

data/lr_data.txt

data/pagerank_data.txt

docs/running-on-yarn.md

docs/spark-standalone.md