Better support for EC2 tags

Opening this up for more visibility, probably not ready for a merge straight into master.  What do you folks think?  This is just pulling in every tag's value that isn't name, and using the name tag for hostname via something like:
 export HOSTNAME=`ec2-describe-tags --filter "resource-id=\`curl -s http://169.254.169.254/latest/meta-data/instance-id\`" | grep Name | sed 's/[ \t]/ /g' | cut -d " " -f 5-`;