correct includeBranchesSpec and excludeBranchesSpec

Merge pull request #10 from sebbrandt87/master

corrected join

gitlab fixed and merged upstream master

Merge pull request #6 from sebbrandt87/feature/gitlab

added allowed branches feature of gitlab_push

gitlab-push and travis plugin support

Merge pull request #3 from oclaussen/feature/travisbuilder

whoops, python doesnt allow - in identifiers