Change Mahara release numbering from pseudo-"Semantic Versioning" (1.11.0) to Ubuntu-style (15.04.0)

[Aaron Wells]

As discussed in the 2014-10-23 developer meeting ( http://meetbot.mahara.org/mahara-dev/2014/mahara-dev.2014-10-23-08.05.html ) we'll be changing the release numbering system for Mahara.

Currently, we're using a (loosely complied-with) version of Semantic Versioning, i.e. A.B.C, where "A.B" is the "major release", and "C" is the "minor release". So far the "A" part of this has been 0 or 1; we've been waiting for a really big backwards-compatibility-breaking change to go from 1.x to 2.x.

Because we're now a 6-monthly release cycle (and for other reasons discussed in the dev meeting), we've decided to change this to a numbering system similar to what Ubuntu uses: YY.MM.x, where YY is the year in 2-digit format, MM is the month in 2-digit format, and x is a minor version number. So instead of 1.11.0, we'll release 15.04.0, and that'll be followed by 15.10.0 and 16.04.0.

This change won't require many code changes (mainly just changing the release number in lib/version.php), but it will require a lot of documentation changes.

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/3875

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/3875
Committed: http://gitorious.org/mahara/mahara/commit/876c81b58c4f17350a1bbfbc7224db46cf5e8aad
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit 876c81b58c4f17350a1bbfbc7224db46cf5e8aad
Author: Aaron Wells <email address hidden>
Date: Wed Oct 29 13:00:36 2014 +1300

Changing version number to new YY.MM.x scheme

Bug 1386937

Change-Id: I91514b8e23b3af44c86516eb4b916c1515e08e09