sudo: false with rasterio deps

[dnomadb]

As per chat w/ @yhahn (https://mapbox.slack.com/archives/satellite/p1441040393007215 + many other convos), we want to able to have modules such as this testable on travis w/ sudo: false. However, I am not sure how to accomplish this on a repo that uses rasterio, which has dependencies that are installed via sudo apt-get install ....

@sgillies can you help guide me in this?

[sgillies]

@dnomadb czech out https://github.com/mapbox/node-pxm-pydeps/blob/master/.travis.yml. Not only Rasterio but Scipy, Scikit-*. Nevermind the the deploy sections.

It's going to be easier for tile-stitcher: declare it a python language project and you can ditch the virtualenv BS in node-pxm-pydeps's before_install section: Travis gives you a working, current virtualenv for free with a python project.

A less complicated example to follow is: https://github.com/mapbox/rio-mbtiles/blob/master/.travis.yml. Write up: https://github.com/mapbox/hey/issues/4672.

[dnomadb]

Thx @sgillies , dialed w/ 43338ff