Migrate Travis to containerised builds; bump Go version
Migrate Travis to containerised builds; bump Go version

- Migrate Travis: see http://docs.travis-ci.com/user/migrating-from-legacy/
- Bump Go version from 1.2 to 1.4: Go 1.2 is outdated

Bren2010/redoctober,ejcx/redoctober,ejcx/redoctober,Bren2010/redoctober