OggCarton

As I reported, the CD ripping process leaks file
descriptors, eventually leading to a crash after
ripping a few hundred tracks.

The patch fixes this by closing all streams once a
java.lang.Process is finished with.

There are also one or two small simplifications mixed
in here. If necessary, I can separate them from the
fix, but they make the code a bit clearer/safer:

# $Id$ comments in one or two files -- help with CVS.
# ActivePlayLists changed from Vector to HashMap
# irrelevant "songSearch" member removed from
ActivePlayLists
# if(size()>0) removed from a Vector iteration in
OggCartonServer
# Use different Process variable for each external
invocation in Ripper.class