* class Line isn't used any more
* class Point inherits from Point2D.Double now (therefore a few classes
could be removed, this makes the class more clearly)
* Merged the class KalmanFilter from Yenni
* improved the complex (room map) weight function. Now it is also
possible to apply the complex weight function to an elliptical
probability map
* fixed three bugs in method calculate(...):ProabilityBaseAlgorithm
  1st: if the given readings (parameter) are empty, null will be
returned
  2nd: if there is a rssi signal for no configured receiver, continue
with work
  3rd: if no weighting occurred, null will be returned
* first part of code dividing in classes and packages so that it make
more sense
* first part of code divided in classes and packages so that it make
more sense
* Changes for a test
* Changes for a test