upgraded sbt version, sbt plugins and some library dependencies to latest stable version
added SPARK_WORKER_INSTANCES : allows spawning multiple worker instances/processes on every slave machine
spark instance number must be present in log filename to prevent multiple workers from overriding each other's logs
Bump development version to 0.8.0
Bumping Algebird version in examples now that it supports JDK 1.6
SPARK-724 - Have Akka logging enabled by default for standalone daemons

See the JIRA for more details.

I was only able to test the bash version (don't have Windows)
so maybe check over that the syntax is correct there.
Update build to Scala 2.9.3
Retry failed ssh commands. This is especially useful during system startup when the hosts may not have yet come on-line but can be useful at other points for people with flakey connections
Add support for building against hadoop2-yarn : adding new maven profile for it
Merge pull request #554 from andyk/scala2.9.3

Fixes SPARK-723 - Update build to Scala 2.9.3
Merge pull request #552 from MLnick/master

Bumping version for Twitter Algebird to latest
Update Scala version in docs
Fix deprecated warning
Updated link to SBT
Updating based on code review
Merge remote-tracking branch 'kalpit/master'

Conflicts:
	project/SparkBuild.scala
Fix compile warning
Fixed a bug with zip
Merge remote-tracking branch 'jey/bump-development-version-to-0.8.0'

Conflicts:
	docs/_config.yml
	project/SparkBuild.scala
Merge pull request #553 from pwendell/akka-standalone

SPARK-724 - Have Akka logging enabled by default for standalone daemons