Fixes
Implement OCI standard fields in configuration format
Make initial configuration structs internal and add the oci spec strucs as children as they do not support all features
Add Volumes json data as seperate blobs to the oci image
Fixed: Actually boot the container to run buildhelper inside it
Fixed: Make image.FindImage return something usefull
Fixed: skip archives marked as rootfs inside zones
Added: Checks to see if images exits
Added: more provisioning to vagrant