/**

 \dir demo

 \brief A collection of demo application.

 This directory contains several simple demo application, mainly

 for educational purposes.

 */

 /**

 \dir doc

 \brief Auxiliary (and the whole generated) documentation.

  Auxiliary (and the whole generated) documentation.

 */

 /**

 \dir test

 \brief Test programs.

 This directory contains several test programs that check the consistency

 of the code.

 */

 /**

 \dir lemon

 \brief Base include directory of LEMON

 This is the base directory of lemon includes, so each include file must be

 prefixed with this, e.g.

 \code

 #include<lemon/list_graph.h>

 #include<lemon/dijkstra.h>

 \endcode

 */

 /**

 \dir concept

 \brief Concept descriptors and checking classes

 This directory contains the concept descriptors and concept checkers. As a user

 you typically don't have to deal with these files.

 */

 /**

 \dir bits

 \brief Implementation helper files

 This directory contains some helper classes to implement graphs, maps and

 some other classes. As a user you typically don't have to deal with these 

 files.

 */