importer: fix bug with assigning sighting type

cast the sighting type ID to an int so that it gets properly assigned

ref #80
importer: fix bug with assigning sighting type

cast the sighting type ID to an int so that it gets properly assigned

ref #80
Importer: improve messaging around importer start/finish

ref #14
allow disabling of select fields

ref #81
make imported sightings non-editable

fixes #81