Add Travis support

[Malwine]

@plexus knows 😊

[Malwine]

Was done!

[vsmart]

@Malwine Reopening this old issue. Did we disable Travis again? I don't see a .travis.yml and no recent builds.

[Malwine]

@vsmart I am sorry I don't remember this at all. I am not sure what the "Was done" means but I dont really remember that we had travis...