Merge pull request #22 from christopherbozeman/master

Updates to Spark readme and adjustments to scripts to support AMI 3.2.0-3.2.1 with v1.1.0.h, addition of Spark release 1.1.1 support with build v1.1.1.e
Update for Spark 1.1 and 1.2 branch experiemental builds.
Merge remote-tracking branch 'upstream/master'