GEOMESA-353 Allow KNN to search using lower resolution GeoHashes

Increase range of allowable precisions in GeoHashSpiral.
GEOMESA-342 - Updated geomesa-tools log4j properties to stop making .log files
GEOMESA-341 Confirm that export-to-Shapefile works as expected

Shapefiles were being written without geometry information. This is because Geotools requires that
the geometry attribute be named the_geom. The geometry attribute now gets renamed for shapefile export only.
GEOMESA-333 Exclude 6 commons math3 files from our distribution