Restoring the file Copyright.txt as it's needed by installer. We can change the content or rename as needed.
Restoring the file Copyright.txt as it's needed by installer. We can change the content or rename as needed.

git-svn-id: 9e047e1e624cce0a2485e750063112e834f85522@8027 fc29be9c-2cb0-420d-b520-73dbd18add6e

opensim-org/opensim-gui,opensim-org/opensim-gui,opensim-org/opensim-gui,opensim-org/opensim-gui