#1 Db connection settings

[Yurko Tymchuk]

Change db connection properties to Java Preferences Api.
Atm settings are red from the properties file that is represented as the resource in /src/java/net/unikernel/npss/controller/resources package. This way it works ok, but the configuration file is hidden far away and we can't write a resource in case we need to save new settings during a runtime.

Some tutorial: http://java.sun.com/developer/technicalArticles/releases/preferences/