Update Spark to 0.8.1 and add hadoop2.2 profile
Merge services files when building assembly JAR
Wholeheartedly make Hadoop 2.2.0 the default
Add explicit dependency on scala-library 2.9.3
Merge pull request #53 from jey/hadoop22-fix

Fix Hadoop 2.2.0 support, upgrade to Spark 0.8.1