Add @mwarkentin to AUTHORS.rst
Add @mwarkentin to AUTHORS.rst

dajose/cookiecutter,terryjbates/cookiecutter,michaeljoseph/cookiecutter,audreyr/cookiecutter,terryjbates/cookiecutter,stevepiercy/cookiecutter,audreyr/cookiecutter,hackebrot/cookiecutter,pjbull/cookiecutter,pjbull/cookiecutter,luzfcb/cookiecutter,hackebrot/cookiecutter,dajose/cookiecutter,michaeljoseph/cookiecutter,stevepiercy/cookiecutter,luzfcb/cookiecutter