C++: added the handler bind macro

Also replacing the old boost bind with it in core projects.

This will make C++ applications source compatible between ipaaca3
(rsb) and ipaaca4 (mqtt, ros, ...) and more stable for the future.

ipaacalib/cpp/include/ipaaca/ipaaca-buffers.h

@@ -125,6 +125,8 @@ class BufferConfigurationBuilder: private BufferConfiguration//{{{
  *
  */
 IPAACA_HEADER_EXPORT typedef boost::function<void (boost::shared_ptr<IUInterface>, IUEventType, bool)> IUEventHandlerFunction;
+#define IPAACA_BIND_CLASS_HANDLER(fn, inst) boost::bind(fn, inst, _1, _2, _3)
+
 
 /** \brief Internal handler type used in Buffer (wraps used-specified IUEventHandlerFunction)
  */