Change version number to 0.7.0
Switch docs to use Akka repo instead of Typesafe
Fix overly large thread names in PySpark
Fix a problem with no hosts being counted as alive in the first job
Small hack to work around multiple JARs being built by sbt package
Some tweaks to docs
More doc tweaks
Use new Spark EC2 scripts by default
Added commented-out Google analytics code for website docs
Change version to 0.7.1-SNAPSHOT for development branch
Merge branch 'master' of https://github.com/mesos/spark into WithAB