Switch to subprocess for updating hosts in parallel.
Improved error handling for "exceeds instance limits". Bug fix for launching replacements.
Removed boto cmdshell dependency completely.
Refactor hostname -> HOSTNAME, name -> CLUSTER_NAME, machines -> NUM_MACHINES. Changed {CLUSTER_NAME}0 to HOSTNAME to better support local testing.
Refactor: missed a file.
Return value bug fix for parsers.
Off by one fix for safety check.
Add comment to note fix.
Don't "over check" for --master. This makes things work for local parsing.
Added local-init.sh for local testing.
Comment fix.
Comment tweaks.