changed the name of the elevation angle property
completely redid CellProperties
added 2nd interface to updateMap, original (native) interface now private, pulic interface accepts the java class of type CellProperties. This way I avoid clutter the code outside of JNIMethods with all the different fields making up CellProp
commented out the C prototype of findcells() in header file
added JavaDoc
testConstructorWithEmpty of class TestCellProperties now throws exception