This is temporary, we should either: release new version and stop
using development version; or import sources in the tezos-repo (and
compile them with jbuilder, especially sodium (or part of it) if it is
not maintened anymore.
Installation:
`./scripts/opam-pin.sh && opam install tezos-node tezos-client`
Upgrade installed packages after a `git pull` (opam2 only):
`./scripts/opam-upgrade.sh`
Remove and cleanup every from the opam repo:
`./scripts/opam-unpin.sh`
