up to 1.5.3 (2017-11-30)

up to 1.5.3 (2017-11-30)

- Fixed require/remove commands reverting the composer.json change when a non-solver-related error occurs
- Fixed GitLabDriver to support installations of GitLab not at the root of the domain
- Fixed create-project not following the optimize-autoloader flag of the root package
- Fixed Authorization header being forwarded across domains after a redirect
- Improved some error messages for clarity