Continued with project:

Continued with project:
- moved PizzaProduct to own package and created BaseProduct from it. This class and interface Product are possible candidates for jcore
- Added Apache commons jar (for new jcore changes for having a non-proprietary implementation of BASE64 encoding and decoding
- Added newly thrown exception CorruptedDatabaseFileException
- Ignored some strings for internationalization
- Id needs to be initialized with zero, not null
- Method toStoreable() has been fully rewritten to a more flexible solution
- Removed some deprecated/unused methods
Signed-off-by:Roland Häder <roland@mxchange.org>