I pushed the 0.5 artifacts to Sonatype’s repo in a staging area. I wish I could give one direct link but I can’t figure out how to do it.
Change the pop-up menu choice to the right of the refresh button to “nexus managed repositories” (instead of the user one). Then, search for spatial4j in the search box. One choice should appear with a name “comspatial4j-1002”. It has a “Browse Storage” tab and you can see a file tree and download the artifacts. I tested doing this without a login (although I do have a login).
+1 is my vote. I mentioned I tested in within Lucene/Solr’s build a few days ago but the API hasn’t changed.