cvmfs/cvmfs — pull request #484 by reneme (2014-06-10 18:24:15+00:00)
Title: Refactor: Move Callback Templates to util.h

This mainly moves the `CallbackBase<>`, `Callback<>`, `BoundCallback<>`, `BoundClosure<>` and `Callbackable<>` from *util_concurrency.\** to *util.\**. Additionally it adds some documentation and test cases for these classes.