Update copyright

Author: TheGiraffe3

copyright

@@ -1,6 +1,8 @@
 Files:
  images/ship/cutlass*
+ images/ship/marauder?behemoth*
  images/thumbnail/cutlass*
+ images/thumbnail/marauder?behemoth*
 Copyright: 1010todd (https://github.com/1010todd)
 License: CC-BY-SA-4.0
 Comment: Derived from works by Michael Zahniser (under the same license).
@@ -16,3 +18,9 @@ Files:
  images/thumbnail/cleaver*
 Copyright: Loymdayddaud (https://github.com/TheGiraffe3)
 License: CC-BY-SA-4.0
+
+Files:
+ images/star/thorne-zytkow*
+ images/star/thorne-zytkow-core*
+Copyright: RisingLeaf
+License: CC-BY-SA-4.0