cli: Handle Python 3 dependencies in CI
cli: Handle Python 3 dependencies in CI

Updated the Travis-CI config to install nipap-cli's requirements (made
after pynipap has been installed to avoid pulling it from PyPI).

SpriteLink/NIPAP,garberg/NIPAP,fredsod/NIPAP,fredsod/NIPAP,bbaja42/NIPAP,bbaja42/NIPAP,bbaja42/NIPAP,garberg/NIPAP,fredsod/NIPAP,fredsod/NIPAP,garberg/NIPAP,bbaja42/NIPAP,SpriteLink/NIPAP,bbaja42/NIPAP,fredsod/NIPAP,bbaja42/NIPAP,SpriteLink/NIPAP,garberg/NIPAP,garberg/NIPAP,SpriteLink/NIPAP,SpriteLink/NIPAP,garberg/NIPAP,fredsod/NIPAP,SpriteLink/NIPAP