- changed primitive types to wrapper classes (boolean -> Boolean), because json-parsers are needing nullable values
- No model class has now any more UUIDS. These values can not be populated to json string out-of-the-box
Merge branch 'master' of https://github.com/bsautermeister/de.htwg.seapal.core

Conflicts:
	src/main/java/de/htwg/seapal/model/impl/Waypoint.java