add LICENCE file for edited/ directory

This fill will be maintained manually

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/library/edited/LICENCE b/library/edited/LICENCE
new file mode 100644 (file)
index 0000000..85aac54
--- /dev/null
+++ b/library/edited/LICENCE
@@ -0,0 +1,15 @@
+SPDX-License-Identifier: CC-BY-SA-4.0
+(applies to the contents of this directory unless otherwise stated)
+
+These files obtained from various places - see below.
+
+They are all available under at least, and distributed here under,
+    CC-BY-SA-4.0
+as well as possibly other licences.  There is NO WARRANTY.
+
+
+Chess_board_blank.svg
+Chess_board_blank.svg?action=raw
+CC-BY-SA-3.0 (compatible with CC-BY-SA-4.0)
+downloaded 2020-09-27, starting from
+https://commons.wikimedia.org/wiki/File:Chess_board_blank.svg