AUV viewer harvester update

Amended all points raised by xavier :
*Logging configuration
*Use iPostgresqlOutput
*timestamps with time zone.
*Take off the schema name when creating the auv_reporting table
*Reject invalid geometry in the auv_tracks and auv_images2 tables, and add a gist index for each geom column.
*Use DROP VIEW IF EXISTS + CREATE VIEW instead of CREATE OR REPLACE VIEW for 'auv_images_vw' and 'auv_tracks_vw' views
*time at time zone UTC.