Add travis ci or circle ci build status

[Siliconrob]

Have the appveyor windows build status ready and would like some help with getting travis ci or equivalent to work. Current problem I am having is the numpy+mkl requirement from the requirements.txt file so anyone with experience on scipy and linux or how to do alternate requirements or setup the travis build to be conditional.

[Siliconrob]

Now have Appveyor and Travis CI build status badges hooked up to commits