I've been out out caffeine since January because I did something similar (and got similar withdrawal symptoms): I started by mixing regular coffee beans with decaf ones. First two weeks I used a 25/75% decaf to regular mix, next two weeks 50/50%, then 75%/25%, etc.
The key for my was finding good quality (and expensive) decaf coffe beans. After triying differente brands I settled with Lavazza.
OpenImageIO is a library for reading and writing images, and a bunch of related classes, utilities, and applications. There is a particular emphasis on formats and functionality used in professional, large-scale animation and visual effects work for film. OpenImageIO is used extensively in animation and VFX studios all over the world, and is also incorporated into several commercial products.