parallelUploads is respected now when uploadMultiple is set to true.
parallelUploads is respected now when uploadMultiple is set to true.

Fixes #247

helbert-rocha/dropzone,Legume1728/dropzone,hpp592720620/dropzone,keitler/dropzone,churchs19/dropzone,helbert-rocha/dropzone,Beronien/dropzone,Chrismarcel/dropzone,cnweibo/dropzone,kaxan3112/dropzone,rusbelvl/dropzone,adamsro/DropzoneS3,SoxFace/dropzone,keitler/dropzone,NervosaX/dropzone,p0o/dropzone,adamsro/DropzoneS3,phizaz/dropzone,devkf/dropzone,un33k/dropzone,lagapollo/dropzone,goodwall/dropzone,StocksyUnited/dropzone,johnofkorea/dropzone,johnofkorea/dropzone,dotcs/dropzone,stanwmusic/dropzone,noamkfir/dropzone,relax/dropzone,stayu/dropzone,relax/dropzone,p0o/dropzone,machty/dropzone,StocksyUnited/dropzone,nousdecor/dropzone,goodwall/dropzone,ilucin/dropzone,sekiyaeiji/dropzone,adamsro/DropzoneS3,exsodus3249/dropzone,codedogfish/dropzone,bluelovers/dropzone,StocksyUnited/dropzone,gopalindians/dropzone,keitler/dropzone,Lysholm/dropzone,vojtasvoboda/dropzone,NervosaX/dropzone,cnweibo/dropzone,nousdecor/dropzone,un33k/dropzone,danpette/dropzone,mochawich/dropzone,phizaz/dropzone,dotcs/dropzone,Chrismarcel/dropzone,perdona/dropzone,vojtasvoboda/dropzone,bluelovers/dropzone,lagapollo/dropzone,mochawich/dropzone,lagapollo/dropzone,NervosaX/dropzone,stanwmusic/dropzone,Beronien/dropzone,ilucin/dropzone,kaxan3112/dropzone,gopalindians/dropzone,SoxFace/dropzone,noamkfir/dropzone,stayu/dropzone,Connectlegendary/dropzone,sekiyaeiji/dropzone,renyaoxiang/dropzone,Legume1728/dropzone,danpette/dropzone,Connectlegendary/dropzone,helbert-rocha/dropzone,machty/dropzone,hpp592720620/dropzone,MasazI/dropzone,antpaw/dropzone,renyaoxiang/dropzone,dotcs/dropzone,devkf/dropzone,SoxFace/dropzone,exsodus3249/dropzone,aknuds1/dropzone,p0o/dropzone,churchs19/dropzone,sekiyaeiji/dropzone,webfatorial/dropzone,goodwall/dropzone,aknuds1/dropzone,noamkfir/dropzone,exsodus3249/dropzone,nhahv/dropzone,57-Wolve/dropzone,adamsro/DropzoneS3,renyaoxiang/dropzone,perdona/dropzone,phizaz/dropzone,johnofkorea/dropzone,codedogfish/dropzone,MasazI/dropzone,nhahv/dropzone,gopalindians/dropzone,webfatorial/dropzone,devkf/dropzone,danpette/dropzone,arg/dropzone,Connectlegendary/dropzone,machty/dropzone,57-Wolve/dropzone,ilucin/dropzone,kungphanith/dropzone,rusbelvl/dropzone,codedogfish/dropzone,kungphanith/dropzone,antpaw/dropzone,relax/dropzone,Legume1728/dropzone,hpp592720620/dropzone,aknuds1/dropzone,antpaw/dropzone,perdona/dropzone,Beronien/dropzone,stayu/dropzone,kaxan3112/dropzone,vojtasvoboda/dropzone,bluelovers/dropzone,MasazI/dropzone,rusbelvl/dropzone,churchs19/dropzone,nousdecor/dropzone,nhahv/dropzone,arg/dropzone,stanwmusic/dropzone,un33k/dropzone,57-Wolve/dropzone,mochawich/dropzone,Chrismarcel/dropzone,Lysholm/dropzone,Lysholm/dropzone,kungphanith/dropzone,cnweibo/dropzone,arg/dropzone,webfatorial/dropzone