Updated AGCO ISOXML reader to improve multi-product application support

Adding better validation on to txt readers and updating units check on planting datasets in GS4 reader.

Updated AgLeader ILF reader to work around invalid harvest calibration files

Resolving a distance issue in seedhawk reader and filling in a few gaps in the reader.

Using shapefile name as product name for Raven Envizio shapefiles.

Improved unit of measure detection for Raven JDP/JDF files

Dropped support for Agris FieldLink prescription export

Updated TrimbleFMX rx exports to ensure that planting prescriptions are always in kiloseeds

Updated AgLeader CSV and TXT readers to improve file validation