TestIndex on Android emulator now also with BerkeleyDB

It's taken a bit longer time than I had expected to get some TestIndex results for BerkeleyDB on Android. A while back I had a running version up and running, but managed somehow to messup the serialization part, so I had to create a new version from scratch that does not use serialization. Instead I used BerkeleyDB's custom TuppleBinding which gives somewhat better performance than serilization. I hope to soon be able to post results using serilization as well, to compare the difference in performance. I will also do some research into the other database management systems that I have tested to see if they have similar optimalizations that can be used.

Results from the test in milliseconds.

	Perst-Emu	SQLite-Emu	DB4O-Emu	BerkeleyDB-Emu
insert	15158	72426	46648	55698
search	12480	100528	290541	37612
iterate	8365	5157	51335	29484
delete	25100	65498	93396	100455