Travis: Declare that we don't use sudo
Travis: Declare that we don't use sudo

This will apparently allow us to build on Travis's new container-based build
system, which is supposed to lead to faster builds. The catch is that we
don't get root access, but we don't need it anyway.

http://docs.travis-ci.com/user/migrating-from-legacy/

mschex1/pokedex,veekun/pokedex,RK905/pokedex-1,DaMouse404/pokedex,xfix/pokedex,veekun/pokedex