bindings: bind ILogger and setLogger()

This will allow users of the parameter-framework bindings to set a logger;
without it, the parameter-framework wasn't able to log anything.

Some SWIG features and workarounds must be activated in order to:

 - Support nested classes;
 - Derive bound classes and allow C++ to call back the user-created objects;
 - Properly handle exceptions that may be raised upon errors happening on the
   user side.

Change-Id: I955152a4658eff3307ad595f175f2624a3acfa8c
Signed-off-by: David Wagner <david.wagner@intel.com>