Refactor of Non-Linear Animation (NLA) System in Blender for 2.5

by Aligorith for Blender Foundation

This project aims to refactor the Non-Linear Animation (NLA) system in Blender to function in conjunction with the new "Animato" animation system core in Blender 2.5. A more extensible framework for evaluating animation clips to layer and mix them will be developed, allowing for the addition of more powerful features at a later stage. This will be presented by a more modern and usable UI for the creation and editing of such data, which clearly exposes the true nature and power of NLA workflows.