Add discussion regarding naming milestones and release candidates

Submitted by Wayne Beaton @wbeaton

Link to original bug (#517754)

Description

Note that this is more of a convention and best practice than a rule.

In terms of the simultaneous release, I've explained it (in part) as such:

-- The simultaneous release has several builds throughout the year. The first seven are milestone builds, denoted M1..M7. Then there are three release candidate builds, denoted as RC1..RC2. Since some projects depend on other projects, each build is staggered into stages (projects in stage 2 depend on projects in stage 1, etc). Stages are denoted as some number of days after we start the build, i.e. +0..+3. So... RC1+0 is the first stage for the first release candidate, RC1+1 is the next day, etc.

We can probably harvest some content from the simultaneous release. The Eclipse Project likely also has some relevant content and there is likely other content in the wiki that can help.