Using TravisCI for testing

[H0R5E]

It looks like TravisCI and CircleCI now both support MATLAB continuous integration. I am going to try and get this working for a copy of WecOptTool on my account and I will report the results here.

[H0R5E]

OK, so I have it up and running on H0R5E/WecOptTool-Test with the build being successful on the master branch. I then have a PR where I have broken the code to check that Travis responds.

Couple of notes on this:

1. It's a bit slow - it's taking about 10 mins to build and test
2. It doesn't seem to be able to run in parallel even though the parallel toolbox is available and there are 2 cores.
3. It only works on linux (for now)

In general, though, I would say this is a good thing to have given it doesn't cost us anything. We can also stop worrying about the Jenkins server on the Sandia network.

Let me know if you want to put it into WecOptTool and I will port the changes over.

[ryancoe]

Sounds good. Please proceed.

[H0R5E]

Done with 05d7705 and 396b166.