create _meta and _link for rqlinked packages

_meta needs to be as empty as possible and _link is just a plain link without any magic or
template
wrote my first test - for create_package_container
also test disable_build=True
support delete requests by adding empty container and wipe it
Merge pull request #27 from coolo/issue_1499

implement #1499 and #1489
Implement move using existing API calls