* update README, example config
* nocloud and aws share IMDS layout, move vars and funcs from aws imds lib to main imds script
* IMDS_USERDATA value is no longer configurable
* note that azure and oci are missing some network bits yet
Compressed User-Data
* extends !23 to support more algorithms
NoCloud
* initial support for volume-based meta-data, user-data, and optional vendor-data
* depends on 'yx' tool to extract data from yaml