checking for null arguments in addPictureBox
checking for null arguments in addPreviewable
checking for null parameters in addSource
checking for null parameters in constructor
checking for null parameters in findBox
checking for null arguments in getSizedBitmap
introduced another test for getSizedBitmap
checked preconditions for getSizedBitmap
checking for null parameter in removePreviewable
checking for null parameter in removeSource
checking for null parameter in rotateAugmentation
checking for null parameter in scaleBitmap
checking for null parameter and invalid object state in scaleIPreviewable
checking for null parameter in setCoordinates
checking for null parameter in setCurrentElement
checking for null argument in updateElementCombobox
removed a testcase which didn't make sense
another testcase which was unneccessary
Merge branch 'master' of https://github.com/Firebusa/ARdevKit.git