Fix array overflow for Mesh.raycast on indexless BufferGeometry

Fix error in BoxHelper with non-geometric objects

Array overflow made raycasting on indexless BufferGeometry horribly slow (for one it was doing 3 times more work, but more importantly, array access outside of array bounds are horribly slow)

make sure uniforms don't get loaded when they are not in the shader

corrects missleading information in "creating a scene" example

- reverts back to the original text, removing any mention about setPixelRatio
- adds information about how to render an app at lower resolution using updateStyle
- replaces mentions of "game" with "app"

Blender exporter: Changed .offsets to .drawcalls.

Conflicts:
	src/renderers/webgl/WebGLGeometries.js

Disable Cache by default

Unused reference to .buffer

The global cache should be opt-in. #6834

`attribute.buffer` does seem to exist anymore. The only `.buffer`
property I could find was in `Audio`.

This seems to be a leftover from
4c7239eb, when `.buffer` was renamed
`.__webglBuffer`.

After stepping through with a debugger in `onGeometryDispose`, I
couldn't find any hidden state attached to the `BufferAttribute`.
`.__webglBuffer`  is attached to the `WebGLProperties`, not the
`BufferAttribute`.

With that, the last reference to `gl.deleteBuffer` is disappearing from
the library. Is that expected?

Blender: Let texture export use numeric constants.

Use version counter for texture updates.

Fix EffectComposer memory problem

Fix info element blocks config menu in SSAO demo

Conflicts:
	examples/js/wip/TypedGeometry.js
	src/objects/Mesh.js