get_error_info returns raw pointer instead of shared_ptr (breaking change)

diagnostic_information can now be called with boost::exception or std::exception object.
BOOST_THROW_EXCEPTION can now be used even if exceptions are disabled.
added functions: current_exception_diagnostic_information, current_exception_cast
documentation updated to match.

[SVN r52225]

include/boost/exception_ptr.hpp

@@ -103,7 +103,7 @@ boost
 
         private:
 
-		exception_detail::clone_base const *
+        exception_detail::clone_base const *
         clone() const
             {
             return new unknown_exception(*this);