Use file.name instead of file.url for getting name of file in GalleryImage
Use file.name instead of file.url for getting name of file in GalleryImage

`file.name` is universal accross storages and can be used not only with
FileSystem storage but with S3 storage as well (`file.name` is used to
create the url). Also with using `name` instead of `url` we will not have
problems with encoding and python version.
Kniyl/mezzanine,joshcartme/mezzanine,viaregio/mezzanine,molokov/mezzanine,AlexHill/mezzanine,frankchin/mezzanine,PegasusWang/mezzanine,eino-makitalo/mezzanine,wbtuomela/mezzanine,frankier/mezzanine,wyzex/mezzanine,readevalprint/mezzanine,dsanders11/mezzanine,industrydive/mezzanine,Kniyl/mezzanine,douglaskastle/mezzanine,tuxinhang1989/mezzanine,ryneeverett/mezzanine,wbtuomela/mezzanine,ryneeverett/mezzanine,promil23/mezzanine,theclanks/mezzanine,cccs-web/mezzanine,viaregio/mezzanine,mush42/mezzanine,dovydas/mezzanine,molokov/mezzanine,Cajoline/mezzanine,dekomote/mezzanine-modeltranslation-backport,biomassives/mezzanine,Kniyl/mezzanine,sjuxax/mezzanine,geodesign/mezzanine,spookylukey/mezzanine,geodesign/mezzanine,eino-makitalo/mezzanine,damnfine/mezzanine,douglaskastle/mezzanine,PegasusWang/mezzanine,Skytorn86/mezzanine,SoLoHiC/mezzanine,nikolas/mezzanine,jerivas/mezzanine,industrydive/mezzanine,douglaskastle/mezzanine,frankchin/mezzanine,eino-makitalo/mezzanine,ZeroXn/mezzanine,cccs-web/mezzanine,emile2016/mezzanine,mush42/mezzanine,wyzex/mezzanine,damnfine/mezzanine,christianwgd/mezzanine,adrian-the-git/mezzanine,PegasusWang/mezzanine,damnfine/mezzanine,sjdines/mezzanine,stephenmcd/mezzanine,jjz/mezzanine,jjz/mezzanine,molokov/mezzanine,gradel/mezzanine,joshcartme/mezzanine,nikolas/mezzanine,gradel/mezzanine,jerivas/mezzanine,jerivas/mezzanine,viaregio/mezzanine,webounty/mezzanine,christianwgd/mezzanine,SoLoHiC/mezzanine,emile2016/mezzanine,geodesign/mezzanine,agepoly/mezzanine,frankchin/mezzanine,Cicero-Zhao/mezzanine,dsanders11/mezzanine,promil23/mezzanine,SoLoHiC/mezzanine,wbtuomela/mezzanine,readevalprint/mezzanine,ryneeverett/mezzanine,sjuxax/mezzanine,fusionbox/mezzanine,webounty/mezzanine,AlexHill/mezzanine,tuxinhang1989/mezzanine,fusionbox/mezzanine,spookylukey/mezzanine,dustinrb/mezzanine,saintbird/mezzanine,wyzex/mezzanine,dsanders11/mezzanine,sjuxax/mezzanine,dovydas/mezzanine,Skytorn86/mezzanine,ZeroXn/mezzanine,dovydas/mezzanine,theclanks/mezzanine,Cajoline/mezzanine,biomassives/mezzanine,gradel/mezzanine,stephenmcd/mezzanine,webounty/mezzanine,agepoly/mezzanine,vladir/mezzanine,Skytorn86/mezzanine,frankier/mezzanine,joshcartme/mezzanine,frankier/mezzanine,saintbird/mezzanine,agepoly/mezzanine,dekomote/mezzanine-modeltranslation-backport,sjdines/mezzanine,batpad/mezzanine,adrian-the-git/mezzanine,nikolas/mezzanine,sjdines/mezzanine,theclanks/mezzanine,dustinrb/mezzanine,industrydive/mezzanine,spookylukey/mezzanine,readevalprint/mezzanine,vladir/mezzanine,adrian-the-git/mezzanine,christianwgd/mezzanine,ZeroXn/mezzanine,saintbird/mezzanine,promil23/mezzanine,biomassives/mezzanine,Cajoline/mezzanine,mush42/mezzanine,vladir/mezzanine,jjz/mezzanine,emile2016/mezzanine,dustinrb/mezzanine,batpad/mezzanine,dekomote/mezzanine-modeltranslation-backport,Cicero-Zhao/mezzanine,stephenmcd/mezzanine,tuxinhang1989/mezzanine