configure Stem's Travis CI to email atagar and the committer when there are failures
I need to:
- check stem's Travis CI github.com/torproject/stem site config to make sure we haven't disabled emails
- configure emails to the committer and atagar on github.com/torproject/stem, or if that's not possible, in .travis.yml
- the difference is that the site will always be running stem master, but other people's repositories can have old stem versions
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information