Bug#683042: debian/copyright: No information of embedded external libraries

[IRIE Shinsuke]

Package: blender
Version: 2.63a-1

debian/copyright doesn't include the copyright information of the
external libraries such as libmv, Eigen3, and Bullet Physics which
are included in orig.tar.bz2 file and will be statically linked.

Also, there are some codes partially imported from external projects.
For example, functions for detecting a pen tablet device were copied
from Wine 1.1.13 (See intern/ghost/intern/GHOST_WindowX11.cpp).

-- 
IRIE Shinsuke