change for Stud.IP Trac migration so far

.gitignore

composer.json

migrate.php

src/GitLab.php

src/Migration.php

src/Trac.php

vendor/m4tthumphrey/php-gitlab-api/.travis.yml

vendor/m4tthumphrey/php-gitlab-api/README.md

vendor/m4tthumphrey/php-gitlab-api/composer.json

...4tthumphrey/php-gitlab-api/lib/Gitlab/Api/AbstractApi.php

vendor/m4tthumphrey/php-gitlab-api/lib/Gitlab/Api/Groups.php

vendor/m4tthumphrey/php-gitlab-api/lib/Gitlab/Api/Issues.php

...thumphrey/php-gitlab-api/lib/Gitlab/Api/MergeRequests.php

...m4tthumphrey/php-gitlab-api/lib/Gitlab/Api/Milestones.php

...phrey/php-gitlab-api/lib/Gitlab/Api/ProjectNamespaces.php

...r/m4tthumphrey/php-gitlab-api/lib/Gitlab/Api/Projects.php

...tthumphrey/php-gitlab-api/lib/Gitlab/Api/Repositories.php

...r/m4tthumphrey/php-gitlab-api/lib/Gitlab/Api/Snippets.php

...4tthumphrey/php-gitlab-api/lib/Gitlab/Api/SystemHooks.php

vendor/m4tthumphrey/php-gitlab-api/lib/Gitlab/Api/Users.php