try previous-previous twisted release to maybe-appease travis-ci
try previous-previous twisted release to maybe-appease travis-ci

ghtdak/txtorcon,ghtdak/txtorcon,meejah/txtorcon,sammyshj/txtorcon,isislovecruft/txtorcon,sammyshj/txtorcon,david415/txtorcon,meejah/txtorcon,david415/txtorcon,isislovecruft/txtorcon