add a block left_panel in base.html to make it easier to over-ride / over-extend
add a block left_panel in base.html to make it easier to over-ride / over-extend

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