changes picture of calculated point
changed default values for kalman filter
* bug fixing: x and y coordinates had NaN sometimes => fixed it
Bug fixing: the algorithm returned the same value each time, because the
strongestSignalValue was 0, but the rssi values are below 0
Merge branch 'master' of https://github.com/mushfiq/rssi-system into
comReaderTommy

Conflicts:
	comReader/main/algorithm/ProbabilityBasedAlgorithm.java