I'm trying to set up a Maven configuration for an OSS project, gwt-presenter. The pom file is located here: https://gwt-presenter.googlecode.com/hg/pom.xml
When I specify the URL, I get an error message: Unexpected error occurred: Not supported. Same happens if I upload the file directly.
I'm not in any way familiar with Maven unfortunately so maybe the file is invalid. I'm trying to set this up on teamcity.codebetter.com where we primarily get .NET projects.