Comment 54 for bug 671632

The nested crates feature is under development for summer of code 2017.
I've completed all the basic stuff, and now it kinda works. You can have crates with songs and other crates, you can toggle recursion on or off, you also have a crate filter for the library.

The PR is here: https://github.com/mixxxdj/mixxx/pull/1304

The nested crates are tied to the new library layout witch is under development since gsoc 2016 and has still quite a few issues to solve before it gets released. I don't know the pace of the people working on it so I can't comment on when it's gonna be ready.

The PR for the new library is here: https://github.com/mixxxdj/mixxx/pull/1117