Update README.txt
Add a link to Eclipse informations in the OpenRefine technical documentation.
developing OpenRefine with Eclipse (http://www.eclipse.org/).
+ For general information on how to setup your Eclipse, please see OpenRefine technical documentation at:
+ https://docs.openrefine.org/technical-reference/build-test-run#building-testing-and-running-openrefine-from-eclipse
+
Code Style Format Configurations (Refine.style.xml)
------------------------------------------------------
