Updated Link to keyword documentation.

Old OGS-Wiki is switched off. Moved keyword docs to netlify:

https://ogs5-keywords.netlify.com

README.md

@@ -1,12 +1,11 @@
 [![Tag](https://img.shields.io/github/tag/ufz/ogs5.svg?style=flat-square)](https://github.com/ufz/ogs5/releases)
 [![BSD License (modified)](http://img.shields.io/badge/license-BSD-blue.svg?style=flat-square)](https://github.com/ufz/ogs5/blob/master/LICENSE.txt)
 [![Travis](https://img.shields.io/travis/ufz/ogs5.svg?style=flat-square)](https://travis-ci.org/ufz/ogs5)
-[![Shippable](https://api.shippable.com/projects/553ff718edd7f2c052d6b180/badge?branchName=develop)](https://app.shippable.com/projects/553ff718edd7f2c052d6b180/builds/latest)
 
 # OGS-5
 
 - General homepage: https://www.opengeosys.org/ogs-5
-- Wiki: https://svn.ufz.de/ogs
+- Keyword documentation: https://ogs5-keywords.netlify.com
 - Benchmarks: https://github.com/ufz/ogs5-benchmarks
 - [ogs-users](https://groups.google.com/forum/#!forum/ogs-users) mailing list