_license/*/LICENSE.TXT: documented that the first section of the file is from license.eml.txt in each folder
/LICENSE.TXT, _license/VegBank_schema/LICENSE.TXT: moved text of the GPL2 license into separate file _license/GPL2.txt to avoid cluttering up LICENSE.TXT
*/LICENSE.TXT: GPL: removed divider between the copyright header and license text, since these are part of the same license
_license/ESA/: renamed to VegBank_schema/ because this license applies only to the VegBank schema
_license/VegBank/: renamed to ESA/ following the convention that each _license/ subfolder is a copyright owner
added _license/VegBank/