2.0.6:

* Fixed a memory leak in sigc::slot.
* Fixed compilation for gcc-3.4.
* Fixed compilation for Intel C++ compiler (upgraded libtool).
* Fixed project files for MSVC .Net (Timothy M. Shead).
* Fixed segfaults when compiled with MSVC .Net 2003 (moved
  all calls to new and delete into non-inline library code).
* In the compatibility module use correct bound_mem_functor
  variants for const (volatile) methods when creating a slot.
* Minor documentation fix.
* Resolved bugs: #152327 #148744 #152323 #151404 #153143