fixes #5 deleted NetBeans configuration file
Fixed cs, added PostgreSQL generators
Changed dialect from derby to posgresql, changed id generation for Product and ProductCategory models
Deleted jpa properties for PostgreSQL.
Added NetBeans and IntelliJ configuration files to .gitignore.
Removed debug and added condition for menu value.
Merge pull request #6 from mkjasinski/diabetyk-5

fixes #5 deleted NetBeans configuration file
Merge pull request #7 from mkjasinski/cs_postgres

Fixed cs, added PostgreSQL generators