Added dot screen shader / effect. Extended postprocessing demo. Fixed viewport bug for render targets.

For clarity reasons I'll start setting the REVISION to *NEXT*dev for the dev branch. And updating to *NEXT* when merged to master.

Modified examples to use it, hacking projection matrix started to feel a bit dirty.

Some clean up on Vector* constructors.
Added UV::clone.

I think cones are still not completely ok, but at least cylinders can be now smooth.

This kinda works in Chrome, though not in Firefox.

I give up on canvas renderer in these two examples in FF, it's anyways extremely slow with nontrivial textured models.

* Added support to texture.offset in CanvasRenderer
* Removed ShadowVolume, ShadowVolumeDynamicMaterial and LensFlare classes.
* Removed Stencil Shadows and LensFlare code out of WebGLRenderer
* Added 2.59 folder to Blender, and removed old ones.

Included corresponding compressor in "utils/exporters/utf8" (prebuilt exe for Windows plus slightly modified C++ source code).

Use UTF8 format with caution, it is very neat but has quite a few limitations:

 - number of vertices < 65536 (this is after optimizations in compressor, input OBJ may have even less)
 - models must have normals and texture coordinates
 - texture coordinates must be only from <0,1>
 - no materials support yet
 - models are scaled and offset (copy numbers from compressor and use them as parameters in UTF8Loader.load() )

Curves refactored - addition of curve path, tangent finding, along with other bend changes and enhancements i may not remember

* Realised that canvas.context has a createPattern method which allows CanvasRenderer to support tiled textures \o/ (Examples where there is a CanvasRenderer and a WebGLRenderer at the same time may get errors because CanvasRenderer now uses texture.needsUpdate too).

Added better random in GeometryUtils. Added possibility of using custom depth material for shadow maps.

Added alphaTest parameter to base Material plus corresponding shader chunk in standard materials implementation.

This is for having on/off transparency without sorting using threshold value in alpha channel of diffuse texture.

By default it's switched off (alphaTest = 0).

AlphaTest is not yet handled in shadow maps. This would require passing of diffuse texture to depth material in shadow map render step (and more permutations of depth material).

This cut TextGeometry creation time almost by half.

Didn't help much, there is still a lot of garbage collection showing up in profiler (~18 %).

Also, real hotspot are loops in Shape.Utils.triangulateShape (with ~27% of total time spend on Vector2.equal). This maybe could be refactored with hashmaps.

Corresponding keys:
 - R up
 - F down

Added path.createSpacedPointsGeometry() and extended shapes example to show such equidistantly sampled paths.

Spaced points are magic that will eventually make objects follow paths with constant speed.

This is a more proper way how to generate visual lines / vertices (all elements use single geometry).

Also extended shapes example to show how to use this with Line and ParticleSystem.