Create translations.git branches for new Torbutton resources

I just added 4 Torbutton resource files that could use git branches to import their translations:

https://www.transifex.com/projects/p/torproject/resource/abouttor-homepage/ https://www.transifex.com/projects/p/torproject/resource/torbutton-brandproperties/ https://www.transifex.com/projects/p/torproject/resource/torbutton-branddtd/ https://www.transifex.com/projects/p/torproject/resource/torbutton-browserproperties/