[boost] Exception library proposal update

Hello, As a result of today's discussion, I added a function get_exception_info to the interface of the proposed Boost Exception library: template <class T> exception_info * get_exception_info( T & ); It can be used in a catch( T & ) block, to check if the exception object has a sub-object of class exception_info. I updated the documentation, source code and tests accordingly, all available at: http://www.revergestudios.com/exception/exception.htm Click "download" to get the code and the tests, complete with boost build jamfiles. Thanks, Emil