Merge pull request #17 from christopherbozeman/master

Update Spark scripts with 1.1.0.f for latest AMIs
Update README.md

Updated the launch cluster command to use s3://support.elasticmapreduce/bootstrap-actions/ public location. Now you can copy and paste the command without the need to replace the S3 locations and the key-pair.
Merge pull request #18 from hvivani/patch-6

Update README.md