support for gitlab personal tokens

• use sha instead of ref to get the correct archive.zip see also https://gitlab.com/gitlab-org/gitlab-ce/issues/31530
• support for gitlab personal tokens
• allow insecure debug mode
• WIP: for performance reason: experimental support to output full list of packages instead of lazy mode

0.0.4: fix download archives by using gitlab API

fix using repository with http protocol (should be used in secure networks only)

0.0.3

Update README.md

0.0.2

send 404 header if a package can not be fetched