Added Composer support

Hi, 

I'm working with images recognitions and work with Composer to manage my dependencies. So, i forked your repository and set the Composer info and register it on Packagist.org as a vendor. 

Please, accept my pull request. The packagist account is under my username, but, if you want, i could transfer to you. 

PS. Sorry for my english :)

Thanks,

Marcelo