See Spring:Organization for responsibilities. For questions / problems please use the bug tracker or the forum and avoid pm's!
Rapid is used for fast distribution of games from a git repository.
It is planed to integrate it directly into the engine. Current WIP state can be found at these two repositories: https://github.com/gajop/pr-downloader
https://github.com/gajop/spring/tree/pr-downloader (pr-downloader branch)