Today version 1.2 of the WebDav4Sbt plugin was released.
This version fixes an issue with publishing Ivy artifacts to WebDav. Thanks to Flanker_9 for raising the issue.
To publish an artifact Ivy-style instead of Maven add to your _build.sbt_:
publishMavenStyle := false
For more info, see the WebDav repo: https://bitbucket.org/diversit/webdav4sbt.
I got the permission to add my plugin to the plugins list on sbt-scala.org. Although I am very busy at the moment, I'm going to try to do this soon.