Annotated Examples proposal

[vivaladav]

Hi,

I've recently posted a tutorial on my blog about how to traverse a git repository using libgit2 and C++ and I was wondering if would be a good idea to add it (after some editing) to the annotated examples.

My idea is to copy the code explained, replace C++ code with C and use the same formatting used in the Repository Initialization example.

Please let me know if this is ok before I do it and submit it as pull request.