Add tarball based packages. Fix environment passing in bin/logstash.

I was having problems with file and sincedb.  I noticed that /proc/<logstashpid>/environ didn't contain $HOME.  I exported HOME from bin/logstash. and I added SINCEDB_DIR since others might be using that.

I added a way to make packages based on the tarball.  I have only tested the ubuntu one so far.