README.md: Rough move to new contribution doc files

No content was changed, new titles are wrapped with () to signal that
they will need to be decided on in a future commit.

CONTRIBUTING-new.md

@@ -1 +1,24 @@
 # Contributing to Nixpkgs
+
+## (Proposing a change)
+
+When pull requests are made, our tooling automation bot,
+[OfBorg](https://github.com/NixOS/ofborg) will perform various checks
+to help ensure expression quality.
+
+## (Merging a pull request)
+
+The *Nixpkgs committers* are people who have been given
+permission to merge.
+
+## (Flow of changes)
+
+Most contributions are based on and merged into these branches:
+
+* `master` is the main branch where all small contributions go
+* `staging` is branched from master, changes that have a big impact on
+  Hydra builds go to this branch
+* `staging-next` is branched from staging and only fixes to stabilize
+  and security fixes with a big impact on Hydra builds should be
+  contributed to this branch. This branch is merged into master when
+  deemed of sufficiently high quality

README.md

@@ -70,26 +70,7 @@ Linux distribution. The [GitHub Insights](https://github.com/NixOS/nixpkgs/pulse
 page gives a sense of the project activity.
 
 Community contributions are always welcome through GitHub Issues and
-Pull Requests. When pull requests are made, our tooling automation bot,
-[OfBorg](https://github.com/NixOS/ofborg) will perform various checks
-to help ensure expression quality.
-
-The *Nixpkgs maintainers* are people who have assigned themselves to
-maintain specific individual packages. We encourage people who care
-about a package to assign themselves as a maintainer. When a pull
-request is made against a package, OfBorg will notify the appropriate
-maintainer(s). The *Nixpkgs committers* are people who have been given
-permission to merge.
-
-Most contributions are based on and merged into these branches:
-
-* `master` is the main branch where all small contributions go
-* `staging` is branched from master, changes that have a big impact on
-  Hydra builds go to this branch
-* `staging-next` is branched from staging and only fixes to stabilize
-  and security fixes with a big impact on Hydra builds should be
-  contributed to this branch. This branch is merged into master when
-  deemed of sufficiently high quality
+Pull Requests.
 
 For more information about contributing to the project, please visit
 the [contributing page](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md).

maintainers/README.md

@@ -1 +1,7 @@
 # Nixpkgs Maintainers
+
+The *Nixpkgs maintainers* are people who have assigned themselves to
+maintain specific individual packages. We encourage people who care
+about a package to assign themselves as a maintainer. When a pull
+request is made against a package, OfBorg will notify the appropriate
+maintainer(s).