corrected error in BirdDensityProfile initialization
added a clause for when nCells equals zero
nCellsValid now always assigned; and return -10 as error code when cellProp not defined
corrected the return type of the JNI analyzeCells function from jfloat to jint
updated and extended the unit test for analyzeCells
extended BirdDensityProfile class with a couple of getters
added kind of an integration test for BirdDensityProfile, which subsequently calls calcTexture, findCells, analyzeCells, fringeCells, and classify. Runs, but the result is still unexplained.