Currently the build creates 2 different tarball layouts.
One is the legacy one, the layout used until 0.22 (ant tar & mvn package -Ptar)
The other is new new one, the layout used in trunk that mimics the Unix layout (ant binary & mvn package -Pbintar).
The legacy layout is of not use as all the scripts have been modified to work with the new layout only.
We should thus remove the legacy layout generation.
In addition we could rename the current 'bintar' to just 'tar'