removed a couple of test for now
added an Ant build script for building the test stuff
added the jars for jacoco and for junit (copied from DiffEvo project on GitHub)
added a test class for testing the class CellProperties.java
cleaned up BirdDensityProfileCalculator
removed the setter methods from this class. Added final modifier to class properties (all class properties can now only be set in the constructor and that's it --protection against accidentally changing stuff)
changed the method sortCells in JNIMethodsVol2Bird to use the new CellProperties object
added final modifier to class properties