Implemented Postgres DAO to store product data.
Fixed PgPriceDaoImpl#delete()
Finished implementation of the DAO layer.
Fixed the storefront after switching to the Postgres DAOs
Added sorting of storefront positions.
Fixed "add-to-cart" in the detail view.
Annotated the repository service with the Repository stereotype.
Configured the commons DBCP connection pool.
Externalized the SQL queries.
Renamed the generic DAO impls.
Added serial version UIDs to model classes.
Added a decent log4j configuration.
Externalized the commons-DBCP configuration settings.