Update README with project status (#880)

README.md

@@ -1,20 +1,24 @@
-Backup v4.x
-===========
+Backup
+======
 
 [![Code Climate](https://codeclimate.com/github/backup/backup.png)](https://codeclimate.com/github/backup/backup)
 [![Build Status](https://travis-ci.org/backup/backup.svg?branch=master)](https://travis-ci.org/backup/backup)
 [![Join the chat at https://gitter.im/backup/backup](https://badges.gitter.im/Join%20Chat.svg)][Gitter]
 
+> This project is now in maintenance. No new features are planned.
+
 Backup is a system utility for Linux and Mac OS X, distributed as a RubyGem, that allows you to easily perform backup
 operations. It provides an elegant DSL in Ruby for _modeling_ your backups. Backup has built-in support for various
 databases, storage protocols/services, syncers, compressors, encryptors and notifiers which you can mix and match. It
 was built with modularity, extensibility and simplicity in mind.
 
-[Installation][] · [Release Notes][] · [Documentation][] · [Issues][] · [Features][] · [Chat][Gitter]
+[Installation][] · [Release Notes][] · [Documentation][] · [Issues][] ·  [Chat][Gitter]
+
+## Project Status: Maintenance-Only ##
+
+This project is not under active development, although we will continue to provide support for current users, and at least one more maintenance release: version 5.0. The version 5.0 release will include support for Ruby 2.4, and various other fixes. Future releases of Backup will only include bug fixes.
 
-Please use the Backup features [issue tracker][Features] to suggest new features.
-Only use the Backup gem [issue tracker][Issues] for bugs and other issues.
-We're also available on [Gitter] for questions and problems.
+If you use this project and would like to develop it further, please introduce yourself on the [maintainers wanted][[Maintainers wanted]] ticket.
 
 **Copyright (c) 2009-2017 [Michael van Rooijen][] ( [@mrrooijen] )**  
 Released under the **MIT** [LICENSE](LICENSE).
@@ -23,7 +27,7 @@ Released under the **MIT** [LICENSE](LICENSE).
 [Release Notes]: http://backup.github.io/backup/v4/release-notes
 [Documentation]: http://backup.github.io/backup/v4
 [Issues]: https://github.com/backup/backup/issues
-[Features]: https://github.com/backup/backup-features/issues
 [Gitter]: https://gitter.im/backup/backup?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
+[Maintainers wanted]: https://github.com/backup/backup/issues/803
 [Michael van Rooijen]: http://github.com/mrrooijen
 [@mrrooijen]: http://twitter.com/mrrooijen