FutureSync: support _connect and < like Future

Change-Id: Ic919d398e3d08317b983f7cdcf77b6b870eebed4
Reviewed-on: http://gerrit.aldebaran.lan:8080/17217
Reviewed-by: mnottale <mnottale@aldebaran-robotics.com>
Tested-by: cgestes <gestes@aldebaran-robotics.com>
add a qi::os::dlerror test

Change-Id: I485cba6ec988292e4e12326dffc99b3e3e5098c0
Reviewed-on: http://gerrit.aldebaran.lan:8080/16993
Reviewed-by: sbarthelemy <sbarthelemy@aldebaran-robotics.com>
Reviewed-by: proullon <proullon@aldebaran-robotics.com>
Tested-by: proullon <proullon@aldebaran-robotics.com>
qi::os::dlerror : mimic Unix behavior on windows.

Change-Id: I1cf057fedf539938604b2b974e103364b23a0e09
Reviewed-on: http://gerrit.aldebaran.lan:8080/17206
Reviewed-by: proullon <proullon@aldebaran-robotics.com>
Tested-by: gerrit
Reviewed-by: hcuche <hcuche@aldebaran-robotics.com>
FutureSync: remove inline, fix value and error. (default args)

Change-Id: Iccbe5b9e4dbdc34689c0aa44be65f74daf1b134a
Reviewed-on: http://gerrit.aldebaran.lan:8080/17261
Tested-by: cgestes <gestes@aldebaran-robotics.com>
Reviewed-by: cgestes <gestes@aldebaran-robotics.com>