Increased reuse through design patterns

• The toalango-util package stands in the center of the project. The module is a set of standalone utilites for file and text handling, only depending on the core Java library. The singleton design pattern is applied to all classes in this package through static-only methods.

• The qzarch-core module delivers the web-enabled search engine. It wraps the toalango-util package and operates in a Servlet based environment. The adapter design pattern is used on this module.
• The demo-web demo application uses the qzarch-core and shows how to integrate it into a standard web application packaged as a .war file. It uses init parameters to configure the search engine and it dispatches the request to a JSP to present the search results to the user, a traditional MVC (model-view-controller) design.
• The demo-app is another demo application which shows how to use the toalango-util package to perform a "find & grep" function in a standalone Java application. This demo relies on the utilities only (it's not based on qzarch-core).