added class CellProperties that contains the Java equivalent of the C struct defined in libvol2bird.h
added class ScanMeta that contains the Java equivalent of the C struct SCANMETA defined in libvol2bird.h
deleted some commented-out code
moved some code from BirdDensityProfileCalculator.java to their respective TestBla classes
created a couple of test classes (not finished yet)
minor changes
minor changes