This library is an awesome project, and I can imagine a lot of 3D application written in C++ would happily use it to load glTF assets ;-)
However, the license wasn't properly stated on the project. To actually put work under the term of the MIT license agreement, a copyright notice **needs** to be distributed alongside the source code.
It is also standard practice to add a warranty disclaimer. This prevent people to hold you liable if (at least they think) something doesn't work because of this library.
I took the liberty to put the file in place, with your full name as stated on your GitHub profile as the copyright holder. This is the text that states that you, the author, grants the to other people to use this as a free/open-source software, with all the thing that comes with it (access to source code, right to modify, redistribute, redistribute modified version, and use for any purpose they like)
Sorry for the annoyance ^^"
