README with screenshot and links

README.md

+# RegionChooser
+
+[![RegionChooserScreenshot][https://i.stack.imgur.com/ldsUV.png]][https://i.stack.imgur.com/ldsUV.png]
+
+[RegionChooser](https://transfer.hft-stuttgart.de/gitlab/hft_gitlab/regionchooser) is a Java project. Its graphical interface allows to extract a specific region from [CityGML](https://www.opengeospatial.org/standards/citygml) and save it as a smaller CityGML file.
+
+It uses:
+
+    * Java 8
+    * JavaFX
+    * [Openlayers](https://openlayers.org/)
+
+## Installation
+
+`mvn clean package`
+
+## Usage
+
+`start.bat` in Windows
+`./start.sh` in Linux
+
+## Author
+
+Eric Duminil, [HfT Stuttgart](https://www.hft-stuttgart.de/)
+
+## Contributors
+
+Matthias Betz, [HfT Stuttgart](https://www.hft-stuttgart.de/)
+
+## License
+[MIT](https://choosealicense.com/licenses/mit/)