TurboGears 2.4.0 released

[Alessandro Molina]

TurboGears 2.4.0 was released, making the new configuration system available as the stable one for all projects.

Release announcement is available at https://github.com/TurboGears/tg2/releases/tag/tg2.4.0

For people that are not aware of what the new configuration system is about, I suggest reading https://medium.com/@__amol__/welcome-turbogears-2-4-6f5f9f0a47a0