added march 8:
- format (mod_string)
- missing constants of mod_effects, used for grayscale (don't show up in list, don't know why, created a page called Grayscale_modes)
- file dialog tutorial, although I could not upload an image to display, because it requires a login.
also added in mod_file:
- fflush (looks like a very miscellanous function, according to stuff I could find about it, it's from the standard C library and it's use is a bit unclear, some people say it's unnecessary to use it). Maybe it explains the difference between say() and say_fast().