Added command line options.
Bugfixing.
Moved the client notifications to the model packages, as pr. #113
Added and "extradata" field to comply with #102
Added missing files.
Another missing file.
Fixed an issue that caused the user to not be authenticated when
using websockets.
Changed organizations term to receptions.
Changed the structure of some of the internal workings in order to
be able compile using an Ada 2005 compiler instead of an Ada 2012
only.