Remove AUTHORS.md and add MAINTAINERS.md

This implements the suggestion to name Stuart as the maintainer for
now. We can later revisit if this is a solution that works and is
sustainable for everyone involved.

AUTHORS.md

@@ -1,23 +0,0 @@
-The Prometheus project was started by Matt T. Proud (emeritus) and
-Julius Volz in 2012.
-
-Maintainers of this repository:
-
-* Fabian Reinartz <fabian.reinartz@coreos.com>
-
-The following individuals have contributed code to this repository
-(listed in alphabetical order):
-
-* Alexander Staubo <alex@bengler.no>
-* Anton Lindström <lindztr@gmail.com>
-* Björn Rabenstein <beorn@soundcloud.com>
-* Cameron Davison <cameron@novilabs.com>
-* Ceesjan Luiten <ceesjan@ytec.nl>
-* Fabian Reinartz <fabian.reinartz@coreos.com>
-* Johannes 'fish' Ziemke <fish@freigeist.org>
-* Julius Volz <julius.volz@gmail.com>
-* Logan Hanks <logan.hanks@gmail.com>
-* Matt T. Proud <matt.proud@gmail.com>
-* Michael Stapelberg <stapelberg@users.noreply.github.com>
-* Steve Durrheimer <s.durrheimer@gmail.com>
-* Tobias Schmidt <ts@soundcloud.com>

CONTRIBUTING.md

@@ -2,9 +2,9 @@
 
 Prometheus uses GitHub to manage reviews of pull requests.
 
-* If you have a trivial fix or improvement, go ahead and create a pull
-  request, addressing (with `@...`) one or more of the maintainers
-  (see [AUTHORS.md](AUTHORS.md)) in the description of the pull request.
+* If you have a trivial fix or improvement, go ahead and create a pull request,
+  addressing (with `@...`) the maintainer of this repository (see
+  [MAINTAINERS.md](MAINTAINERS.md)) in the description of the pull request.
 
 * If you plan to do something more involved, first discuss your ideas
   on our [mailing list](https://groups.google.com/forum/?fromgroups#!forum/prometheus-developers).

MAINTAINERS.md

@@ -0,0 +1 @@
+* Stuart Nelson <stn@soundcloud.com>