New API

After developing effects for a few weeks with the API of v0.3.x, it became clear that some changes were needed.

Problems

• The pv.Cache API is hard to use.

• Unable to access C++ utility functions from external add-ons.

• Render Jobs are weird and difficult to use

• No good way of rendering a chunk of frames (this will be useful for multicore export).

Solutions

• The effects should not exist in the folder pvkernel/addons. They should be in their own folder, but may be copied to pvkernel/addons` when building the wheel.

• Instead of render jobs, we will have props and operators under the namespace render. These will handle the rendering.

• In each release, pvutils.hpp file is provided. This is the header for utility functions.