Integrating Andreas Zieringer's shared lib changes

Modified Files:
	build/Jamfile build/win32_mwcc_setup.bat src/classes.cpp
	src/conversions.cpp src/cross_module.cpp
	src/extension_class.cpp src/functions.cpp
	src/init_function.cpp src/module_builder.cpp src/objects.cpp
	src/types.cpp


[SVN r12084]

src/cross_module.cpp

@@ -8,6 +8,8 @@
      17 Apr 01 merged into boost CVS trunk (Ralf W. Grosse-Kunstleve)
 */
 
+#define BOOST_PYTHON_SOURCE
+
 # include <boost/python/cross_module.hpp>
 namespace python = boost::python;
 # include <stdio.h> // MSVC6.0SP4 does not know std::fprintf