ModestEx - Pipeable transformations on html strings (with CSS selectors)

Greetings @f34nk , I have been trying to get modest_ex to work with Erlang 24.x. I know my C/C++ is rusty, but I’ve spent a good half-day on this without any progress. I am currently stuck looking for vec.h, which doesn’t seem to exist anywhere on my Mac or Linux boxes. Any pointers here? Thank you!