v0.3.0

Switched to using NonNull pointers, since in rust 1.53 they fixed some method's signatures for it, and it wasn't comfortably usable beforehand.
Therefore, this is a major release because it won't work for people that haven't upgraded to rust 1.53.
Also, some documentation changes were made.

v0.2.0

bump version

v0.1.1

This is the first version of the library
(v0.1.0 is the same except for minor documentation changes, so i didn't bother tagging it)