Extend LICENSE file with clear intentions and information about files without headers. Everything here is free and open source, except the branding

LICENSE

@@ -1,3 +1,21 @@
+No file of this program is without a specific license. But some files miss a direct header:
+
+This program is licensed under the GPLv3, as seen in the original text below.
+This software release (or source repository) contains files that were either autogenerated from
+files not contained here or are "save files" of programs such as the Qt Designer. For technical
+reasons they do not have a license header. They are all licensed GPLv3 as well.
+
+All documentation is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License.
+To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/4.0/ or send a
+letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.
+
+Again, if a file with documentation is not licensed through a header or notice in the file itself
+it is licensed under CC-By-Sa 4.0 as well. The reasons for not including a header are purely technical.
+
+All files and content considered "branding" are licensed as CC-By-ND. Such as image files, logos,
+icons. These and the name of the program itself cannot be reused when forking and re-releasing.
+
+
                     GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007