#394 The package command flattened the run path
into a single JAR but removed any manifest information
available to the JARs. However, Eclipse used manifest
information like the Bundle-Activator to do 
internal initialization. So the packager now
constructs the manifest from the run path (last entry
in the run path wins). Additionally, Import-Package
was removed since Equinox could not handle this.
Tad weird that Equinox tries to resolve itself.
Implementing user defined macros
Changed the packager to create an external class path
from the internal jars. Tried to use the URL
class loader with internal URLs from the JAR but that
did not work so ended up copying them to a tmp
file.
Oops, test failed.
Delete files on exit