[meld/master] Replace README with a note about the master -> main move

[Kai Willadsen <kaiw src gnome org>]

commit 83c0c1d1a8e43e8ab741a8d00ba0ecce48bb2b14
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Tue Sep 6 07:58:30 2022 +1000

    Replace README with a note about the master -> main move

 README.md | 125 +-------------------------------------------------------------
 1 file changed, 1 insertion(+), 124 deletions(-)
---
diff --git a/README.md b/README.md
index 9a03c465..4a994086 100644
--- a/README.md
+++ b/README.md
@@ -1,124 +1 @@
-
-About Meld
-==========
-
-Meld is a visual diff and merge tool targeted at developers. Meld helps you
-compare files, directories, and version controlled projects. It provides
-two- and three-way comparison of both files and directories, and supports
-many version control systems including Git, Mercurial, Bazaar, CVS and Subversion.
-
-Meld helps you review code changes, understand patches, and makes enormous
-merge conflicts slightly less painful.
-
-Meld is licensed under the GPL v2 or later.
-
-
-Requirements
-------------
-
-* Python 3.6
-* pycairo (Python3 bindings for cairo without GObject layer)
-* PyGObject 3.30 (Python3 bindings for GObject introspection)
-* gsettings-desktop-schemas
-
-And following packages with GObject introspection:
-
-* GLib 2.36
-* Pango
-* PangoCairo
-* GTK+ 3.20
-* GtkSourceView 4.0
-
-
-Build requirements
-------------------
-
-* Python 3.6
-* Meson 0.48
-* Ninja
-* gettext
-* GLib 2.36 and its development utilities such as `glib-compile-schemas`
-
-For Windows build requirements, see `mingw-common` section `.gitlab-ci.yml`
-
-
-Running
--------
-
-You *do not* need to build Meld in order to run it. Meld can be run directly
-from this source directory by running:
-
-```sh
-$ bin/meld
-```
-
-Unix users should get Meld from their distribution package manager, or from
-[Flathub](https://flathub.org/).
-
-Windows users should download the provided MSIs on the
-[Meld home page](https://meld.app/).
-
-OSX users can install Meld using Homebrew (or Macports, Fink, etc.), or there
-are unofficial native builds available from the
-[Meld for OSX](https://yousseb.github.io/meld/) project.
-
-
-Building
---------
-
-Meld uses [meson](https://mesonbuild.com/) build system. Use the following
-commands to build Meld from the source directory:
-
-```sh
-$ meson _build
-$ cd _build
-$ ninja
-```
-
-You can then install Meld system-wide by running:
-
-```sh
-$ ninja install
-```
-
-A Windows installer can be built with command
-
-```powershell
-C:\Python34\python.exe setup_win32.py bdist_msi
-```
-
-which will create the file `dist/Meld-VERSION-ARCH.msi`.
-
-
-Developing
-----------
-
-It's easy to get started developing Meld. From a git checkout, just run
-`bin/meld`.
-
-We also support development using Flatpak via GNOME Builder. At the Builder
-"Clone..." dialog, enter https://gitlab.gnome.org/GNOME/meld.git, and the
-default build + run development flow using Flatpak should work.
-
-
-Contributing
-------------
-
-Meld uses GNOME's GitLab to track bugs, and user questions and development
-discussions happen on the Meld mailing list. The development team is small,
-and new contributors are always welcome!
-
-List of issues: https://gitlab.gnome.org/GNOME/meld/issues
-
-Support forum:  https://discourse.gnome.org/tag/meld
-
-
-
-Links
------
-
-Home page:      https://meld.app/
-
-Documentation:  https://meld.app/help/
-
-Wiki:           https://wiki.gnome.org/Apps/Meld
+# Meld's default branch is now `main`; please update any references