Update README.md

Add  Valhalla (Open Source Routing Library/Service)
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Howard Hinnant 2018-11-01 15:19:35 -04:00 committed by GitHub
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@ -55,6 +55,7 @@ cmake --build . --target testit # Consider '-- -j4' for multithreading
* www.safe.com
* www.webtoolkit.eu/wt
* https://github.com/ViewTouch/viewtouch
* https://routinghub.com
* https://routinghub.com
* https://github.com/valhalla
If you would like your project (or product) on this list, just let me know.