Update to Blender 2.69. Add fixes for building with Clang, either from
upstream or submitted for upstream. Import changes:

A new hidden wire display option was added to help with retopology. Mesh
Bisect is a new tool to cut meshes in half. The Bridge, Edgenet fill,
Grid fill and Symmetrize tools were improved. New curve and lattice
editing tools were added too.

Hair rendering was improved with a new Hair shader and reorganized
settings. Subsurface scattering uses a new sampling algorithm and now
supports bump mapping and texture blurring. Sky rendering now uses a
more accurate sky model. New blackbody, vector transform and HSV nodes
were added. The non-progressive integrator was renamed to Branched Path
Integrator, and is now available for GPU rendering.

The Motion tracker now supports plane tracking, which can be used to
replace billboards, screens and other flat things in footage.

Lists in the user interface can now be resized, sorted and filtered.
Further there are small improvements for vertex parenting, empty
objects, the shrinkwrap modifier, mask editing, armatures, f-curves and
drivers.

FBX Import support has been added and FBX/OBJ can now export split
normals (without the need for the edge split modifier).

In addition to the new features, over 270 bugs that existed in previous
releases have been fixed.

(joerg)