travis.yml: don't test against python 3.3
travis.yml: don't test against python 3.3

Signed-off-by: Niklas Koep <342d5290239d9c5264c8f98185afedb99596601a@gmail.com>

j-towns/pymanopt,pymanopt/pymanopt,tingelst/pymanopt,nkoep/pymanopt,pymanopt/pymanopt,nkoep/pymanopt,nkoep/pymanopt