Update README.md

README.md

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 # OpenGeoSys Data Explorer Manual #
 
-## What is this? ##
-
-These are the LaTeX-sources and images to compile the [OpenGeoSys](http://www.opengeosys.org) Data Explorer Manual. Please report any errors, typos, unexplained features or anything else
-regarding the Data Explorer or its documentation.
-
-- [Download as PDF](http://docs.opengeosys.org/assets/releases/head/docs/DataExplorer-Manual.pdf)
-
-## License ##
-
-This work (text, pictures, etc.) is published under [Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported License](http://creativecommons.org/licenses/by-nc-sa/3.0/).
+This repo has been moved to GitLab: https://gitlab.opengeosys.org/ogs/data_explorer_manual