update README

- remove build status badge
- change app name
- update copyright notice
- update links

services/document-updater/README.md

@@ -1,13 +1,11 @@
-document-updater-sharelatex
+overleaf/document-updater
 ===========================
 
 An API for applying incoming updates to documents in real-time.
 
-[![Build Status](https://travis-ci.org/sharelatex/document-updater-sharelatex.png?branch=master)](https://travis-ci.org/sharelatex/document-updater-sharelatex)
-
 License
 -------
 
 The code in this repository is released under the GNU AFFERO GENERAL PUBLIC LICENSE, version 3. A copy can be found in the `LICENSE` file.
 
-Copyright (c) ShareLaTeX, 2014.
+Copyright (c) Overleaf, 2014-2019.