Add history section

Author: kwin

README.md

@@ -25,3 +25,8 @@ The default implementation shipping with this artifact is supposed to impose min
 
 [M2Eclipse](https://www.eclipse.org/m2e/) is using this API for supporting both incremental builds and fully integrated error markers in Eclipse. They maintain information for Mojo developers at [Making Maven Plugins Compatible](https://www.eclipse.org/m2e/documentation/m2e-making-maven-plugins-compat.html).
 Currently only versions up to 0.0.7 (with old Maven coordinates `org.sonatype.plexus:plexus-build-api`) are supported, this limitation is tracked in [Issue 944](https://github.com/eclipse-m2e/m2e-core/issues/944).
+
+History
+-----
+
+The project was relocated from <https://github.com/sonatype/sisu-build-api>. Also its Maven coordinates changed from `org.sonatype.plexus:plexus-build-api` to `org.codehaus.plexus:plexus-build-api`, the API is still the same, though.