Automate code review process with Danger (minimum requirements)

Project page: http://danger.systems

We should handle errors from the build scripts:
- [x] checkstyle
- [x] pmd
- [x] codenarc
- [x] license
- [x] sortpom
- [x] bootlint
- [x] rflint
- [x] jasmine
- [x] html5validator
- [x] enforcer
- [x] compilation
- [x] unit tests
- [x] findbugs
- [x] integration tests
- [x] robot framework tests

Pull request to see this in action: #533 