[autotools] added ax_python_devel.m4
[autotools] use another variant of ax_python_devel.m4
[autotools] patch ax_python_devel.m4 to be optional
[autotools] add AX_PYTHON_DEVEL
[autotools] add ax_boost_python.m4
[autotools] add AX_BOOST_PYTHON
[fem.namespace] added mixxing guard