Add Authors and rules

I agree with the rules, but I need two modifications:

• We should be more accurate on the "minor changes" and major changes meaning. May be say that in respect with semantic versioning, major.minor.patches -> "major and minor versions" = "major changes", "patches versions" = "minor changes".
• "major and minor versions" changes needs MR and at least one maintainer approval. Patches can be directly pushed to dev branch.

My wishes are:

All MR should be related to an issue, and all MR should be reviewed by at least one available maintainers.
MR from maintainers do not need a review.
 
Maintainers only ask for review when they need a validation, an advice or a hint. Otherwise they can do MR alone without review.
Because important decisions and discussion have already been done on the related issue(s).
 
Only the MR for release should be reviewed and validated by at least one available maintainers.

Tell me what you think about it.

changed milestone to %0.60.0

changed milestone to %0.61.0

mentioned in issue #111 (closed)

changed milestone to %0.62.0

changed milestone to %Backlog

mentioned in issue #149 (closed)