Test Octave support for continuous integration testing

[agitter]

https://github.com/scottclowe/matlab-continuous-integration provides an example of Travis CI testing for MATLAB code via Octave. If we can run SCINGE on Octave, we can set up basic continuous integration testing.

This would likely require recompiling or adapting the Glmnet mex files for Octave.

[agitter]

It may be easiest to test SCINGE inside and Octave Docker container such as:

• https://hub.docker.com/r/compdatasci/octave-desktop
• https://github.com/openmicroscopy/octave-docker

There are instructions and examples for setting up Travis CI with Docker:

• https://docs.travis-ci.com/user/docker/
• https://github.com/travis-ci/docker-sinatra
• https://github.com/openmicroscopy/octave-docker/blob/master/.travis.yml

Step 1 would be to enable Travis CI on this repository. Then we can do all the testing in a new pull request.

[agitter]

Because we found that MATLAB can run within Docker, that may be a faster route to setting up Travis CI. An example is https://hub.docker.com/r/fbenz/docker-java-matlab

[agitter]

This should be fixed in Octave 4.4 per this bug report https://savannah.gnu.org/bugs/?func=detailitem&item_id=53951