schemas/VegCore/VegCore.ERD.mwb: split taxon_occurrence into taxon_occurrence and taxon_observation, because a taxon_*occurrence* is actually the thing on which a taxon_*observation* is made, not the observation itself. rearranged tables significantly to put observations next to the things they observe, and to make the ERD less wide so it will fit on a small screen without as much scaling (allowing a bigger font size when the ERD is shrunk to fit the screen).
schemas/VegCore/VegCore.ERD.mwb: split taxon_occurrence into taxon_occurrence and taxon_observation, because a taxon_*occurrence* is actually the thing on which a taxon_*observation* is made, not the observation itself. rearranged tables significantly to put observations next to the things they observe, and to make the ERD less wide so it will fit on a small screen without as much scaling (allowing a bigger font size when the ERD is shrunk to fit the screen).