Add awsAccessKeyId and awsSecretAccessKey to the ephemeral hdfs config
Add AWS access keys into the deploy template
Merge branch 'v3' of https://github.com/mesos/spark-ec2 into v3
Merge pull request #58 from danosipov/v3

Add S3 configuration
Fixed template substituion when value is None (not found on environment)
Merge remote-tracking branch 'origin/pr/74' into v4

Closes #74.
update broken hadoop link
update Maven link
Support Spark 1.1.1
Adding Spark 1.2.0
Add realpath to fix rJava install issues
Add realpath to create_image.sh
Add in new Packer scripts.
Try waiting on yum locks.
Ignore Packer logs.
Packer-generated AMIs.
Add in benchmark of new AMIs without Spark.
remove release-specific builds
install and use GNU parallel with rsync