- Known bugs
   ° FBCM always gives the same result.
   ° Cannot compute the error (Real) with autocalibration requests.

- Algorithms
   ° Check MultilaterationAlgorithm::make_constant_term().
   Hint: mobile.trx_power() vs. ap.trx_power().
   ° MinMax: use a different step for X, Y and Z?

- Autocalibration
   ° Generate reference points in 3D.
   ° Handle 2 APs, not only >2 APs.
   ° Find why some CalibrationRequest were not deleted when
   calling Stock::delete_calibration_request() (via
   ReferencePoint::delete_requests()).

- Refactoring
   ° Split Stock::regenerate_reference_points() into several
   functions.
   ° Create virtual class OutputSocket to factorise code of
   OutputUDPSocket & OutputTCPSocketEvAAL.
   ° Synchronise InputCSV & InputUDPSocket (calibration requests),
   factorise code into InputMedium.
   ° Write a class for Request::type?
   CalibrationRequest::direction uses a dedicated class Direction, why
   not Request::type? That would simplify writing of the type to
   streams (no need to cast each time anymore).
   ° Wi-Fi devices' list
   .   Merge Stock::mobiles & Stock::aps?
   .   Factorise AccessPointsReaderCSV & MobilesReaderCSV?
   ° Members renaming
   .   InputMedium:
   .   - current_line_nb & get_current_line_nb()
   .   - get_next_request() −> read_next_request()
   .   Input: get_next_request() −> read_next_request()
   .   Area: p_min et p_max −> coord_min et coord_max

- User interface
   ° Add the area to the result in OutputCSV.
   ° When reading the APs, add them to the mobiles' list (or another
   way to be able to have a single entry for an AP).
   ° Rename minmax-start & stop, since it is used elsewhere (grep
   minmax-start).
   ° Review the option names & descriptions.
   ° Add option positioning.self-calibrate (or autocalibrate), to
   activate automatically the options needed by the autocalibration.
   ° Improve --verbose (and/or debug level): print the options, etc.
   ° Case-insensitive string comparison (for algorithm names, etc.).
   ° Use a prefix for configuration files (search for config files set
   with relative path in owlps-positioning.cfg in the same directory).

- Optimisation & code improvement
   ° Multithread algorithm calls.
   ° ReferencePoint: the request list should be an unordered_set
   instead of a vector, to guarantee the unicity of the elements.

- Unit tests
   ° Update tests (currently unmaintained).
   ° Unfinished tests:
   .   InputDataReader
   .   Input
   .   Output
   .   Positioning
   ° Test InterlinkNetworks::compute() ?
   ° Timestamp: there is a probability of 10^-6 that the value in
   nanoseconds and the rounded value in milliseconds are identical, in
   which case some tests can fail.

- Revoir le diagramme UML
   ° Associations : devraient êtres représentées par des attributs
   pointeurs.
   ° Compositions : devraient être représentées par des attributs
   normaux.

- « C++ en action »
   ° Espaces de noms ? 109
   ° Réserver l'espace mémoire des vector avec reserve(). 217
   ° Copie de conteneur vers un flux (cas de certains operator<<). 275

- « Coder proprement »
   ° Revoir toutes les classes pour respecter si possible les
   principes exposés dans le chapitre 6 (p. 103) : implanter
   systématiquement des accesseurs pour tous les attributs d'une
   classe expose l'implantation de la classe et rend ses attributs
   publics. La classe Direction (et maintenant Timestamp) tend à
   respecter ce principe en utilisant mieux les opérateurs et en ne
   proposant pas d'accesseur direct.