Add AUR package

[giodamelio]

First off let me say thanks for creating this, I have manually searched through git objects a few times to recover stuff, and having this will make my life easier in the future.

Since I don't like throwing random shell scripts in my $PATH, I went a head and created a AUR package to install it. Thought maybe you could add it to the README.

Right now the package is fixed to commit f7ee394, but in the future if you add git tags, Github will make releases and I can use those for nicer version numbers.

I can also add you as a maintainer of the package if you have an AUR account.