Log Message:
Update blender to 2.74

Blender 2.74, released Mar 31 2015!
- Cycles got several precision, noise, speed, memory improvements, new
  Pointiness attribute.
- Viewport has new cool compositing features, outliner now manages
  orphan datablocks better.
- Modeling now allows custom normals, and transferring data layers
  between meshes!
- Massive improvements to hair dynamics and editing tools: a big step
  forward with more to come…
- A new tool “Cavity Mask” was added to  sculpting/painting, along with
  other improvements.
- Great memory consumption optimization in Freestyle NPR stroke rendering.
- Grease pencil and Game engine improvements, and more…

Blender 2.73, released January 8 2015!
- Several Cycles Rendering updates, improvements and new features, support
  for GeForce 9xx GPUs.
- New fullscreen mode, improved Pie Menus, 3D View can now display the
  world background.
- Knife-tool now allows freehand smart cuts, and more improvements were
  made in selection tools, Bevel Modifier and Shapekeys.
- Unwrapping UVs was improved, strength is now enabled for Grab and Snake
  Hook brushes, better visual feedback mode for painting with masks.
- Sequencer now can show a backdrop, strips can be snapped to others along
  with other improvements.
- Freestyle NPR Rendering has a new SVG exporter add-on, along with other
  improvements.
- Grease Pencil had a major update, it is now possible to edit and animate
  strokes! New draw styles, and imporvements in user interface.
- Collada Importer was updated, improving the compatibility with other
  software’s bone concepts.
- Add-ons: FBX improved importing/exporting armatures, some Python API
  changes  could need some Add-ons to be updated!
- As usual several other minor updates and improvements, and lot of
  bugfixing also in this release.

Blender 2.72, relased Oct 4 2014.
Cycles GPU rendering supports Volume and Subsurface Scattering now. The
User Interface comes with optional Pie Menus now and the Tooltips have been
improved. For Modeling, a new intersection tool has been added in Edit Mode.
Texture painting workflow has been streamlined with easy access to painted
images and UV layers. The Compositor now comes with a Sun Beam node.
Freestyle NPR rendering is now available with Cycles as well.