This commit was manufactured by cvs2svn to create branch 'function_v2'.

svn path=/branches/function_v2/boost/boost/function/; revision=13596
Mixins and policies are no longer supported

svn path=/branches/function_v2/boost/libs/function/; revision=13822
Removed Mixins & Policies
Added ThreadingPolicy with (untested) thread safety

svn path=/branches/function_v2/boost/boost/function.hpp; revision=13823
Added threading models

svn path=/branches/function_v2/boost/boost/function/; revision=13824