1.2.0 Release

This version introduces many new features and lots of improvement, mostly related to UI and stability, and a new, integrated development workflow.

See the full changelog at https://raw.githubusercontent.com/ocaml/opam/1.2.0/CHANGES

Important note

There are small changes in the repository format, your .opam/ will be automatically updated on first run.
Back it up if you may need to roll back to an older OPAM version.