Added basic code for streaming tests.
Updated scripts and added first streaming test.

- HdfsRecoveryTest tests whether every file written to a directory is
  read by the system.
- Run scripts updated to redirect test's stdout and stderr to separate
  files for future debugging.
Add log4j.properties and save logs to a file
The output from the driver is directed to stderr and a unique file name is
used for each benchmark.
Add milliseconds to log4j and print logfile name
Merge pull request #13 from shivaram/master

Add log4j.properties and save logs to a file
Changes to added Patrick PR 12 comments.
Merge branch 'amplab-master'

Conflicts:
	bin/run
Few more minor changes for PR 12.
Fixed bugs found in config.py.template while in PR 12.
Merge pull request #12 from tdas/master

Updated spark-perf for running streaming tests
Merge pull request #15 from pwendell/master

Changes for Spark 0.9.0
Support writing input data to HDFS.

This saves a lot of time if tests are run repeatedly and generate
a lot of data.