PrettyPrint: exports enclosed printer classes for VS2013
PrettyPrint: exports enclosed printer classes for VS2013

Change-Id: I434df0752b592facdc86cfee85543e7fdd4882e6
Reviewed-on: http://gerrit.aldebaran.lan/83614
Reviewed-by: jmonnon <8898eaf233516e520f996a244ca8a12d20f948b1@aldebaran.com>
Tested-by: vincent.palancher <f8ff75e1c61314c499fafa8de0d9e004e87e66b0@external.softbankrobotics.com>

aldebaran/libqi,aldebaran/libqi,aldebaran/libqi