* Remove Revive standalone linter - use it via golangci-lint
* Add revive settings to ignore lint errors for now
* Small fix
* Update to grabpl v0.5.53
* Remove errorCode and warningCode from config
* Build: use golangci-lint as a make command
* Since gometalinter was deprecated in favor of golangci-lint so it was
replaced by it. Responsibilities held by the gometalinter was moved to
golangci-lint
* There was some changes in implementation (that was also mentioned in
the code comment) between the tools, which uncovered couple errors
in the code. Those issues were either solved or disabled by
the inline comments
* Introduce the golangci-lint config, to make their
configuration more manageable
* Build: replace backend-lint.sh script with make
Same idea as with the `gosec`, `revive` and etc.
Allows you to execute `make bra` as pinned local dependency instead
as global one. And therefore alleviates dependency installation issues.
README also updated - I was thinking to provide verbose installation instructions
for it. Since with that way we assume make is installed on the
developer system.
But it might be premature right now?
