Add "remote add" and "remote rm" commands
Add "remote add" and "remote rm" commands

To add and delete remote branches from all subrepos. e.g.

    ./sync-all -r ~/git/ghc-working remote add working
    ./sync-all remote rm working

ml9951/ghc,ekmett/ghc,gcampax/ghc,oldmanmike/ghc,elieux/ghc,da-x/ghc,nushio3/ghc,lukexi/ghc-7.8-arm64,sgillespie/ghc,acowley/ghc,nathyong/microghc-ghc,snoyberg/ghc,mettekou/ghc,christiaanb/ghc,fmthoma/ghc,anton-dessiatov/ghc,mcmaniac/ghc,shlevy/ghc,ilyasergey/GHC-XAppFix,forked-upstream-packages-for-ghcjs/ghc,forked-upstream-packages-for-ghcjs/ghc,GaloisInc/halvm-ghc,gcampax/ghc,ryantm/ghc,ghc-android/ghc,spacekitteh/smcghc,siddhanathan/ghc,siddhanathan/ghc,urbanslug/ghc,nushio3/ghc,frantisekfarka/ghc-dsi,mcschroeder/ghc,nathyong/microghc-ghc,TomMD/ghc,anton-dessiatov/ghc,AlexanderPankiv/ghc,fmthoma/ghc,holzensp/ghc,urbanslug/ghc,christiaanb/ghc,olsner/ghc,elieux/ghc,siddhanathan/ghc,mettekou/ghc,acowley/ghc,nushio3/ghc,ryantm/ghc,fmthoma/ghc,mcmaniac/ghc,snoyberg/ghc,nushio3/ghc,lukexi/ghc,sdiehl/ghc,nkaretnikov/ghc,shlevy/ghc,lukexi/ghc,olsner/ghc,lukexi/ghc,siddhanathan/ghc,anton-dessiatov/ghc,ezyang/ghc,nushio3/ghc,gridaphobe/ghc,oldmanmike/ghc,mettekou/ghc,anton-dessiatov/ghc,wxwxwwxxx/ghc,ekmett/ghc,da-x/ghc,gridaphobe/ghc,sgillespie/ghc,jstolarek/ghc,mcmaniac/ghc,ezyang/ghc,gcampax/ghc,olsner/ghc,sdiehl/ghc,acowley/ghc,olsner/ghc,urbanslug/ghc,bitemyapp/ghc,AlexanderPankiv/ghc,spacekitteh/smcghc,nathyong/microghc-ghc,urbanslug/ghc,siddhanathan/ghc,nkaretnikov/ghc,fmthoma/ghc,christiaanb/ghc,nushio3/ghc,da-x/ghc,vikraman/ghc,TomMD/ghc,ezyang/ghc,nomeata/ghc,elieux/ghc,jstolarek/ghc,shlevy/ghc,mcmaniac/ghc,gridaphobe/ghc,da-x/ghc,urbanslug/ghc,ryantm/ghc,oldmanmike/ghc,gcampax/ghc,nomeata/ghc,GaloisInc/halvm-ghc,mfine/ghc,vTurbine/ghc,tjakway/ghcjvm,GaloisInc/halvm-ghc,green-haskell/ghc,gridaphobe/ghc,mfine/ghc,elieux/ghc,da-x/ghc,hferreiro/replay,urbanslug/ghc,snoyberg/ghc,ml9951/ghc,elieux/ghc,vTurbine/ghc,vikraman/ghc,vTurbine/ghc,sdiehl/ghc,GaloisInc/halvm-ghc,sdiehl/ghc,christiaanb/ghc,olsner/ghc,ghc-android/ghc,vikraman/ghc,shlevy/ghc,olsner/ghc,wxwxwwxxx/ghc,ml9951/ghc,ghc-android/ghc,nkaretnikov/ghc,holzensp/ghc,ilyasergey/GHC-XAppFix,ekmett/ghc,sgillespie/ghc,christiaanb/ghc,wxwxwwxxx/ghc,nkaretnikov/ghc,mcschroeder/ghc,urbanslug/ghc,ml9951/ghc,ekmett/ghc,tibbe/ghc,spacekitteh/smcghc,GaloisInc/halvm-ghc,AlexanderPankiv/ghc,vikraman/ghc,wxwxwwxxx/ghc,ezyang/ghc,nomeata/ghc,nushio3/ghc,vikraman/ghc,oldmanmike/ghc,acowley/ghc,tibbe/ghc,sgillespie/ghc,elieux/ghc,nomeata/ghc,spacekitteh/smcghc,frantisekfarka/ghc-dsi,nkaretnikov/ghc,green-haskell/ghc,spacekitteh/smcghc,lukexi/ghc,hferreiro/replay,ilyasergey/GHC-XAppFix,tjakway/ghcjvm,fmthoma/ghc,lukexi/ghc-7.8-arm64,gcampax/ghc,TomMD/ghc,AlexanderPankiv/ghc,sgillespie/ghc,tibbe/ghc,acowley/ghc,forked-upstream-packages-for-ghcjs/ghc,christiaanb/ghc,acowley/ghc,da-x/ghc,lukexi/ghc-7.8-arm64,green-haskell/ghc,nathyong/microghc-ghc,mfine/ghc,frantisekfarka/ghc-dsi,bitemyapp/ghc,nkaretnikov/ghc,holzensp/ghc,lukexi/ghc,forked-upstream-packages-for-ghcjs/ghc,sdiehl/ghc,anton-dessiatov/ghc,forked-upstream-packages-for-ghcjs/ghc,bitemyapp/ghc,AlexanderPankiv/ghc,ml9951/ghc,snoyberg/ghc,oldmanmike/ghc,wxwxwwxxx/ghc,holzensp/ghc,TomMD/ghc,sgillespie/ghc,tibbe/ghc,ghc-android/ghc,mcschroeder/ghc,ghc-android/ghc,tibbe/ghc,vTurbine/ghc,vTurbine/ghc,fmthoma/ghc,bitemyapp/ghc,nathyong/microghc-ghc,acowley/ghc,bitemyapp/ghc,oldmanmike/ghc,hferreiro/replay,ryantm/ghc,GaloisInc/halvm-ghc,mettekou/ghc,mettekou/ghc,TomMD/ghc,lukexi/ghc-7.8-arm64,snoyberg/ghc,wxwxwwxxx/ghc,shlevy/ghc,nkaretnikov/ghc,jstolarek/ghc,snoyberg/ghc,gcampax/ghc,tjakway/ghcjvm,nathyong/microghc-ghc,oldmanmike/ghc,hferreiro/replay,gridaphobe/ghc,hferreiro/replay,vikraman/ghc,wxwxwwxxx/ghc,ezyang/ghc,ml9951/ghc,mcmaniac/ghc,tjakway/ghcjvm,nathyong/microghc-ghc,sdiehl/ghc,vikraman/ghc,vTurbine/ghc,jstolarek/ghc,tjakway/ghcjvm,anton-dessiatov/ghc,TomMD/ghc,fmthoma/ghc,ghc-android/ghc,mfine/ghc,shlevy/ghc,frantisekfarka/ghc-dsi,gridaphobe/ghc,ezyang/ghc,hferreiro/replay,shlevy/ghc,tjakway/ghcjvm,da-x/ghc,christiaanb/ghc,green-haskell/ghc,siddhanathan/ghc,ekmett/ghc,anton-dessiatov/ghc,hferreiro/replay,sgillespie/ghc,vTurbine/ghc,ryantm/ghc,jstolarek/ghc,mettekou/ghc,ml9951/ghc,elieux/ghc,AlexanderPankiv/ghc,gridaphobe/ghc,ml9951/ghc,sdiehl/ghc,mcschroeder/ghc,ezyang/ghc,tjakway/ghcjvm,mfine/ghc,mfine/ghc,AlexanderPankiv/ghc,forked-upstream-packages-for-ghcjs/ghc,olsner/ghc,holzensp/ghc,mfine/ghc,frantisekfarka/ghc-dsi,mcschroeder/ghc,gcampax/ghc,ilyasergey/GHC-XAppFix,lukexi/ghc-7.8-arm64,GaloisInc/halvm-ghc,mcschroeder/ghc,siddhanathan/ghc,nomeata/ghc,TomMD/ghc,mcschroeder/ghc,green-haskell/ghc,ghc-android/ghc,mettekou/ghc,snoyberg/ghc,forked-upstream-packages-for-ghcjs/ghc