Hola, buenas
Las librerias las tienes en el primer post, veras que hay un zip con la version 1.5, pero esta libreria no estaba actualizada y daba algun problema con las versiones sdk actuales.
Edit: FileProvider is included as an internal library now. After investigating several issues with the current FileProvider code that you can find in the forum, I decided to make some improvements and implement it in a class. Starting from Android 7 (API 24) you cannot directly share file uris...