Libraries upgrade:

- Upgrade Eigen2 library to Eigen3
- Upgrade colamd library and placed in extern/ so other libraries from extern/ can use it

NOTE: With previous version of Eigen (3.0.1) it was necessary to define
      EIGEN_DONT_ALIGN_STATICALLY macro to make it compilable on windows 32bit.
      After latest upgrade it seems to be unnecessary (at least when was testing libmv),
      so i removed that defines which can reduce speed and lead to other problems.

extern/colamd/CMakeLists.txt

@@ -23,7 +23,7 @@
 # ***** END GPL LICENSE BLOCK *****
 
 set(INC
-	Include
+	./Include
 )
 
 set(INC_SYS
@@ -34,8 +34,7 @@ set(SRC
 	Source/colamd.c
 	Source/colamd_global.c
 
-	Include/colamd.h
-	Include/UFconfig.h
+	Include//colamd.h
 )
 
 blender_add_lib(extern_colamd "${SRC}" "${INC}" "${INC_SYS}")