Merge branch 'master' into network/gdev-800

.gitlab-ci.yml

Cargo.lock

Cargo.toml

client/distance/Cargo.toml

client/distance/README.md

client/distance/src/lib.rs

distance-oracle/Cargo.toml

distance-oracle/README.md

distance-oracle/src/api.rs

distance-oracle/src/lib.rs

distance-oracle/src/main.rs

distance-oracle/src/mock.rs

distance-oracle/src/tests.rs

docs/dev/beginner-walkthrough.md

docs/packaging/build-rpm.md

docs/user/distance.md

end2end-tests/tests/common/distance.rs

end2end-tests/tests/common/mod.rs

live-tests/tests/sanity_gdev.rs

node/Cargo.toml