Added gthb to AUTHORS.
Added gthb to AUTHORS.

shasha79/pysolr,toastdriven/pysolr,rokaka/pysolr,mylanium/pysolr,mbeacom/pysolr,django-searchstack/skisolr,mbeacom/pysolr,upayavira/pysolr,mylanium/pysolr,swistakm/pysolr,django-searchstack/skisolr,upayavira/pysolr,shasha79/pysolr,rokaka/pysolr,CANTUS-Project/pysolr-tornado,django-haystack/pysolr,10clouds/pysolr,10clouds/pysolr,CANTUS-Project/pysolr-tornado,django-haystack/pysolr,toastdriven/pysolr,swistakm/pysolr