QI_EQUIVALENT_STRING_REGISTER: New.
QI_EQUIVALENT_STRING_REGISTER: New.

Change-Id: I3661c452ae3f187e0b2f6d1d3f7f024767aaeb3c
Reviewed-on: http://gerrit.aldebaran.lan:8080/17534
Reviewed-by: cgestes <ddb78fe00abb42f91254c16a0860e38eb0781789@aldebaran-robotics.com>
Reviewed-by: mnottale <e3ccf1b6558404e921a21fa09cebb1153b50ec36@aldebaran-robotics.com>
Tested-by: mnottale <e3ccf1b6558404e921a21fa09cebb1153b50ec36@aldebaran-robotics.com>

aldebaran/libqi,vbarbaresi/libqi,bsautron/libqi,aldebaran/libqi,aldebaran/libqi