Another thing, I see we used to have ``org.apache.ivy.*;version=2.2.0`` and noticed we used to have a [ivy.version property](https://github.com/scala-ide/scala-ide/pull/472/files#L5L30) that wasn't referenced anywhere. Should it be restored, and the MANIFEST be updated to ````org.apache.ivy.*;version=${ivy.version}``. However, also in this case I'm wondering, how can we know that 2.2.0 is the right version?