gildegoma/postgresql-update-beta-apt-packages
Make PostgreSQL 9.5 Beta apt packages available
This change is a little helper for users interested to install 9.5 on the build fly. The pre-installation of 9.5 on Travis machine/container images will only come after general availability (which is currently planned for end 2015).
Note: '9.4' apt component is no longer necessary (final releases are in 'main' component)