How to better manage release doc

[zemian]

The GitHub Issues allow only two categories: Label and Milestone. Naturally we use a release label for Milestone and assign issue for each. But some issues are fixed across multiple releases, and we can't do that with Milestone in GitHub :(

We can either use Label for a release or we can track them with a RELEASE.adoc file. Which one is better?

If we use Label, then creating Milestone per release label seems redundant. I suppose Milestone is just a categories of ONE timeline bucket rather than tight to multiple release schedules.

[zemian]

This is addressed by #301