added some matlab files
plotppi is now in directory ncradar/matlab
updated .gitignore
moved test_radar_file_java.m to matlab/ directory
replaced by a BirdDensityProfileJava and a BirdDensityProfileMatlab though
updated the parameter values based on values I took from the manual, ans also added the final modifier to the respective variables
minor update
minor updates
this class should tie the other functions, including the native functions, together.