Audio buffer source: Added missing semicolons.
Graph plugin: Added config option that allows the user to set
the render target filtering method (added nearest).
Updated the blender exporter:

* Fixed bug that could introduce an additional comma leading
to a parsing error.

* Simplified the stream naming scheme (backwards compatible).

* Made the default filename 'scene.json' rather then using the
name of the current .blend file, since that's what the client
load code expects the file to be called.