improved JunctionReader, junctions can now connect to an unlimited number of streests

src/GridGenerator/StreetPointFinder/JunctionReader.cpp

src/GridGenerator/StreetPointFinder/JunctionReader.h

src/Traffic/Junction/JunctionData.h

src/Traffic/Junction/JunctionRandom.cpp

src/Traffic/Output/ConcBySpeedAndAcceleration.cpp

src/Traffic/Output/ConcBySpeedAndAcceleration.h

src/Traffic/TrafficMovement.cpp

src/Traffic/TrafficMovementFactory.cpp

targets/apps/LBM/Basel/resources/Junctions.txt

targets/apps/LBM/Basel/resources/Streets.txt

targets/apps/LBM/Basel/resources/fourStreets/Junctions.txt

targets/apps/LBM/Basel/resources/fourStreets/Sinks.txt

targets/apps/LBM/Basel/resources/fourStreets/Sources.txt

targets/apps/LBM/Basel/resources/fourStreets/Streets.txt

targets/apps/LBM/TrafficTest/TrafficTest.cpp