Fix a few README typos
Fix another README typo
Add a note about permissions on the keyfile
Add note about infrastructure location

It was already specified, but I missed it the first time through.
adds recipe task
Security Groups
Print details for security groups.  Still need to format case with multiple incoming groups
formatting for multiple incoming groups
Simple security group list
strip permissions off of group instead of destroying it
YAML instead of JSON for security groups
Update README.md
Volume config examples updated to be valid yaml.
Merge pull request #1 from jsuchy/master

Updates docs with valid json for volumes
Allow specifying the username for ssh commands

This is useful since the AMIs are already customizable and the username
will vary based on it.
Update example docs to match implementation
Allow executing only a single command w/ ssh task