Make explicit jareditor dependency on bndlib

1) Add bndlib to the jareditor feature
2) Don't copy aQute.bnd.* packages into jareditor. Just import them.

jareditor was already dependent upon bndlib for some time (when aQute.service.reporter package was added to bndlib) but the jareditor copied all the aQute.bnd.* packages into itself (when it only needed 2: aQute.bnd.header, aQute.bnd.osgi) attempting to be stand-alone so the jareditor feature could be installed without installing the bndtools feature. But this was not possible since there was an actual dependency on bndlib.

So lets make the existing dependency explicit. A follow on to this would be to consider removing the jareditor feature and just having a single bndtools feature.