This release introduces the possibility to use optimizers. A JPEGTRAN optimizer has been created as a sample optimizer. Other optimizers (pngquant, gifsicle and the like) can be created as contributed libraries by the community.
It also adds the following contributions:
- Now thumbor supports HEAD requests. This was a contribution by @justinribeiro;
- We also feature blacklisting of images. This was a contribution by @clifff.