Review: After Effects plug-in project updates

Brendan Bolles <bre...@...>

Pull request here:

The After Effects plug-in currently is built with Xcode and Visual
Studio projects. When they were move to their new homes inside src/
aftereffects, relative paths were broken. This will fix them.

Also updates projects for the current state of OCIO, including the
current versions of tarballs found in ext/.