create deb repo for 0.3.0.x alpha

the first 0.3.0.x alpha has been released: https://lists.torproject.org/pipermail/tor-talk/2016-December/042736.html

deb.tpo does not provide packages for it yet: https://deb.torproject.org/torproject.org/dists/

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information