add logo license

README.md

@@ -8,7 +8,7 @@
 
 nom is a parser combinators library written in Rust. Its goal is to provide tools to build safe parsers without compromising the speed or memory consumption. To that end, it uses extensively Rust's *strong typing* and *memory safety* to produce fast and correct parsers, and provides macros and traits to abstract most of the error prone plumbing.
 
-![nom logo](https://raw.githubusercontent.com/Geal/nom/master/assets/nom.png)
+![nom logo in CC0 license, by Ange Albertini](https://raw.githubusercontent.com/Geal/nom/master/assets/nom.png)
 
 *nom will happily take a byte out of your files :)*