Reproducible research

setting up Travis CI for github repos

I wanted to set up Travis CI long time ago. Finally, I have a chance to do so. There are already many posts on how to do it. I write it down here for my own future reference. Thanks Tao Liu for the instructions. I have been learning a lot from him in collabrating with the MAESTRO project. read the official documentation Jean Fan’s blog post R specific https://docs.