[Bro] Libcaf errors

[Matthias Vallentin]

As of CAF 0.14, caf::detail::abstract_uniform_type_info is no longer
considered an implementation detail and has therefore been hoisted to
the parent namespace. 

I've pushed the necessary fixes to the branch topic/caf-0.14-fix (which
also get rid of the deprecated sb_actor warnings and a compile error on
OSX). Please give it a shot to see whether it works for you now.

Jon, if that looks fine to you, feel free to merge.

    Matthias