md5sum prints out the hash, followed by the filename. When piped in from
stdin, this equates to a '-' character.
cluster/aws/util.sh was incorrect including this '-' character as part
of the S3 bucket name, causing the script to fail on Linux machines with
the md5sum binary.
i.e. "s3://kubernetes-staging-0ac68d8c77915cc1069a9e2f5e1f1d2d -"
Fixed by using `awk` to return only the first column (up to the space)
Fix calling function before declaration
Set Name tags on instances
Hide import-key-pair error
Fix instances names resolution
Implement kube-down for AWS provider
Add cluster validation routines. Make changes according to #1255
Implement post-deployment cluster validation
Set proper master name in userdata scripts
Fix kube-down path in hint
Add getting started for AWS
