Update dependency notes for Grappelli and Filebrowser in README. Closes #137 and #138.
Update dependency notes for Grappelli and Filebrowser in README. Closes #137 and #138.

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