ansible ec2 deployment

based on spark stand-alone cluster scripts
EC2 Security Group config
HDFS on EC2
switched to CDH5 hdfs 2.3
HDFS 2.3 config
pptpd role to use for gateway
CDH5 spark role
move size into hdfs volumes dict
clean vars
playbook refactors
add: error msg
fix: lots of weird bugs and cleanup
added handlers for hadoop config change
HDFS needs AWS creds, sweet
installing jvm is part of allocation, not setup
tweaks based on usage, restart spark script
debug logs
shared gitignore
dumping hadoop 1.2.1 config
dump temp files