added _license/TWiki/ (for inputs/VegBIEN/TWiki/)

added _license/PostgreSQL_config (for schemas/*.conf)

*/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/README.TXT: merged ¶2 into ¶1

_license/README.TXT: replaced "authority information proving the open-source status" with the simpler "open-source proof". clarified that each LICENSE.TXT is meant as a proof.

/LICENSE.TXT: added note that when redistributing, it recommended to include _license/, so that the open-source proof is included along with the license text (this information should be here as well as in _license/README.TXT because redistributors might not think to look in that file)

/LICENSE.TXT: removed "svn" before "repository" because this would apply equally to a git export of the repository

/LICENSE.TXT: replaced "portions" with "parts" for consistency with the _license/README.TXT wording

_license/README.TXT: clarified that this folder contains authority information proving the open-source status of parts of the codebase. added recommendation to include this folder when redistributing, so that the open-source proof is included along with the license text.