Added script that can be put in the system path to get "git pushall" command, which pushes to all remotes.
Added script that can be put in the system path to get "git pushall" command, which pushes to all remotes.

aebarber/ScriptToolbox,aebarber/ScriptToolbox,aebarber/ScriptToolbox,aebarber/ScriptToolbox,aebarber/ScriptToolbox