Version number should not be removed from copied JARs

[jpsacha]

I some cases when JARS are copied their versions are omitted. This likely due to way their are published - Scala-like publishing may be causing problems. Here is an example of a JAR in IVY published by SBT using default settings:

.ivy2\local\net.sf.ij-plugins\ijp-color_2.11\0.5.0-SNAPSHOT\jars\ijp-color_2.11.jar

The JAR actually has no version number in its name, it is in parent's directory name. The version number needs to be restored when copying to plugins directory.