Adding experimental (and optional) support of log4cxx logging.

Also, adding a sample logging configuration
diff --git a/model/sync-scheduler.cc b/model/sync-scheduler.cc
index c5f1ca0..f54f91f 100644
--- a/model/sync-scheduler.cc
+++ b/model/sync-scheduler.cc
@@ -21,11 +21,13 @@
  */
 
 #include "sync-scheduler.h"
-#include <boost/date_time/posix_time/posix_time.hpp>
+#include "sync-log.h"
 
 using namespace boost;
 using namespace std;
 
+INIT_LOGGER ("Scheduler");
+
 namespace Sync {
 
 Scheduler::Scheduler ()
@@ -45,6 +47,7 @@
 void
 Scheduler::threadLoop ()
 {
+  _LOG_FUNCTION (this);
   while (m_threadRunning)
     {
       try