2.7.2 (unstable):

* Deprecate sigc::ref() and sigc::reference_wrapper(),
  adding support instead for std::ref(), std::cref(),
  and std::reference_wrapper().
  (Murray Cumming)
* mem_fun(): Deprecate mem_fun(pointer, func).
  Leaving just mem_fun(reference, func).
  Please let us know if you disagree strongly with this.
  (Murray Cumming) Bug #763215
* Make all operator bool() explicit. (A C++11 feature.)
  (Murray Cumming)
* Build: Remove some now-unnecessary configure checks.
  But please let us know if this causes problems for you.
  (Murray Cumming) Bug #762065 (Kjell Ahlstedt)
* Build: Update MSVC project.
  (Chun-wei Fan)
* Documentation: Improve the documentation of mem_fun(), making it clear that
  mem_fun() does not return a slot.
  (Kjell Ahlstedt)