Added Coopers to sites in README.
Added Coopers to sites in README.

stephenmcd/mezzanine,nikolas/mezzanine,scarcry/snm-mezzanine,jjz/mezzanine,dustinrb/mezzanine,mush42/mezzanine,frankier/mezzanine,sjuxax/mezzanine,ZeroXn/mezzanine,douglaskastle/mezzanine,Cajoline/mezzanine,promil23/mezzanine,promil23/mezzanine,biomassives/mezzanine,sjdines/mezzanine,industrydive/mezzanine,dekomote/mezzanine-modeltranslation-backport,sjuxax/mezzanine,industrydive/mezzanine,dovydas/mezzanine,eino-makitalo/mezzanine,emile2016/mezzanine,Kniyl/mezzanine,Skytorn86/mezzanine,PegasusWang/mezzanine,frankier/mezzanine,adrian-the-git/mezzanine,frankchin/mezzanine,gradel/mezzanine,mush42/mezzanine,ZeroXn/mezzanine,damnfine/mezzanine,SoLoHiC/mezzanine,nikolas/mezzanine,molokov/mezzanine,dsanders11/mezzanine,jerivas/mezzanine,nikolas/mezzanine,agepoly/mezzanine,gbosh/mezzanine,AlexHill/mezzanine,viaregio/mezzanine,webounty/mezzanine,readevalprint/mezzanine,vladir/mezzanine,agepoly/mezzanine,frankchin/mezzanine,emile2016/mezzanine,molokov/mezzanine,wyzex/mezzanine,geodesign/mezzanine,emile2016/mezzanine,fusionbox/mezzanine,webounty/mezzanine,wbtuomela/mezzanine,batpad/mezzanine,stephenmcd/mezzanine,spookylukey/mezzanine,Cicero-Zhao/mezzanine,joshcartme/mezzanine,sjdines/mezzanine,tuxinhang1989/mezzanine,orlenko/sfpirg,dustinrb/mezzanine,orlenko/sfpirg,frankier/mezzanine,promil23/mezzanine,gradel/mezzanine,wyzex/mezzanine,Kniyl/mezzanine,tuxinhang1989/mezzanine,adrian-the-git/mezzanine,joshcartme/mezzanine,theclanks/mezzanine,vladir/mezzanine,sjdines/mezzanine,dekomote/mezzanine-modeltranslation-backport,ryneeverett/mezzanine,orlenko/plei,ryneeverett/mezzanine,stbarnabas/mezzanine,SoLoHiC/mezzanine,viaregio/mezzanine,guibernardino/mezzanine,geodesign/mezzanine,ZeroXn/mezzanine,Kniyl/mezzanine,mush42/mezzanine,agepoly/mezzanine,gbosh/mezzanine,christianwgd/mezzanine,scarcry/snm-mezzanine,webounty/mezzanine,wrwrwr/mezzanine,saintbird/mezzanine,molokov/mezzanine,cccs-web/mezzanine,biomassives/mezzanine,viaregio/mezzanine,batpad/mezzanine,PegasusWang/mezzanine,wrwrwr/mezzanine,tuxinhang1989/mezzanine,eino-makitalo/mezzanine,christianwgd/mezzanine,orlenko/plei,spookylukey/mezzanine,jjz/mezzanine,scarcry/snm-mezzanine,orlenko/plei,dovydas/mezzanine,Skytorn86/mezzanine,wyzex/mezzanine,saintbird/mezzanine,wbtuomela/mezzanine,damnfine/mezzanine,SoLoHiC/mezzanine,gbosh/mezzanine,Cajoline/mezzanine,douglaskastle/mezzanine,guibernardino/mezzanine,sjuxax/mezzanine,stephenmcd/mezzanine,wbtuomela/mezzanine,industrydive/mezzanine,jerivas/mezzanine,cccs-web/mezzanine,AlexHill/mezzanine,dovydas/mezzanine,readevalprint/mezzanine,christianwgd/mezzanine,gradel/mezzanine,dustinrb/mezzanine,biomassives/mezzanine,adrian-the-git/mezzanine,ryneeverett/mezzanine,eino-makitalo/mezzanine,stbarnabas/mezzanine,dsanders11/mezzanine,spookylukey/mezzanine,saintbird/mezzanine,damnfine/mezzanine,jerivas/mezzanine,Skytorn86/mezzanine,geodesign/mezzanine,orlenko/sfpirg,readevalprint/mezzanine,theclanks/mezzanine,Cicero-Zhao/mezzanine,vladir/mezzanine,jjz/mezzanine,theclanks/mezzanine,joshcartme/mezzanine,Cajoline/mezzanine,douglaskastle/mezzanine,PegasusWang/mezzanine,dsanders11/mezzanine,fusionbox/mezzanine,frankchin/mezzanine,dekomote/mezzanine-modeltranslation-backport