Automated windows build

[stefanfoulis]

• [x] basic build for windows
• [x] actually test the resulting binary on a windows machine ( @vxsx )
• [ ] auto create github release with binary for releases later
  • https://www.appveyor.com/docs/deployment/github/

For the other platforms:

• https://docs.travis-ci.com/user/multi-os/
• https://docs.travis-ci.com/user/deployment/releases/
• https://docs.travis-ci.com/user/osx-ci-environment/

[Chive]

can we do automated mac build as well? :D

[stefanfoulis]

@Chive yes we can do an automated osx build on travis.

[Chive]

@stefanfoulis are you gonna do that as well? :)

[stefanfoulis]

@Chive not right now. But yeah.