Linux and macOS Automated Builds

[Touched]

Now that ARMIPS has automated builds for Windows, it would be nice if we had this for other platforms too.

I've written a configuration for Travis CI which deploys to GitHub Releases automatically over here, but it would be better if this could be integrated into the main repository.

I'd be happy to work on a pull request if necessary to get this going, but I'd be unable to set up the actual Travis CI integration.

My repostory also has an AppVeyor configuration to deploy Windows 32-bit and 64-bit builds to BinTray which might also be useful.