Continued with project:

Continued with project:
- added install.sql
- Renamed method getProducts() to getAvailableProducts()
- Added method getAllProducts()
- Renamed parseLineToCategory() and parseLineToProduct() to parseLine()
- All products are now comparable + compareTo() implemented in BaseProduct
- Added column "id" for product database
- Implemented getPrintableProduktAvailability() very rudely
- Ids must be parsed as Long, not Integer, as the BASE64-encoded database backend does parse it so
- Added "available" to HTML form and all relevant methods
- Added method decodedTitle() to have a UTF8-decoded title
- Constructor PizzaProduct (id, title, price) is now deprecated
- Some other cleanups
Signed-off-by:Roland Häder <roland@mxchange.org>