Introduce Python bindings

These bindings for the parameter-framework generic connector use "SWIG" to
generate:

 - a C++ file providing a basic bridge between C++ and Python (must be compiled
   to a shared library named "_PyPfw.so" - the name is important)
 - a Python module wrapping it inside a Proxy class, re-creating the same
   classes as the parameter-framework generic connector.

See http://www.swig.org

 for the full SWIG documentation.

They are generated and compiled on-the-fly as part of the build process.

Change-Id: If7c67f1178dcc9f438cf037246eb77bbd74b689a
Signed-off-by: David Wagner <david.wagner@intel.com>
Signed-off-by: Sebastien <Gonzalve&lt;sebastien.gonzalve@intel.com>