Signed-off-by: Philip Withnall <withnall@endlessm.com>

Might make the API documentation a little easier to find from the GitLab
landing page for GLib.

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

Helps: #2348

The content of the section was more appropriate to the `NEWS` file, and
no longer helpful for anyone reading the `README`. The `README` is meant
to be a quick introduction to the project and how to contribute to it,
not a set of notes for packagers and distributors. That’s what `NEWS`
is.

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

This was mostly machine generated with the following command:
```
codespell \
    --builtin clear,rare,usage \
    --skip './po/*' --skip './.git/*' --skip './NEWS*' \
    --write-changes .
```
using the latest git version of `codespell` as per [these
instructions](https://github.com/codespell-project/codespell#user-content-updating).

Then I manually checked each change using `git add -p`, made a few
manual fixups and dropped a load of incorrect changes.

There are still some outdated or loaded terms used in GLib, mostly to do
with git branch terminology. They will need to be changed later as part
of a wider migration of git terminology.

If I’ve missed anything, please file an issue!

Signed-off-by: Philip Withnall <withnall@endlessm.com>

And drop FTP from the list of places where to find release archives.
This is not 1998.

There seems to be little point in substituting the version number into
README (using autotools). Rename it to README.md and distribute that
verbatim (with autotools and Meson) instead.

Autotools still requires that README exists, so leave a stub README file
in place which redirects people to README.md. This can be dropped when
we drop autotools support.

Signed-off-by: Philip Withnall <withnall@endlessm.com>