edited saveProject to accept only project, ChartStyle is serializable, IDMarker and PictureMarker do not contain AbstractSensor anymore, it is set in Project, because there is only one type of Trackable allowed in a Project.
Merge branch 'master'
Added possibility to add a title to xAxis
Merge branch 'master' of https://github.com/Firebusa/ARdevKit
Merge branch 'master'