Strand: support wrapping non-const functions
Strand: support wrapping non-const functions

Change-Id: Iec0ba53f4709bf2863c66d9d879148be7f36df89
Reviewed-on: http://gerrit.aldebaran.lan/67883
Reviewed-by: hcuche <2a0975cc082cedff4d4350e3f6ec187146151bc6@aldebaran.com>
Tested-by: vpaleologue <cb19838a79eb484e12a6960acfbf7c16dfdb80d9@aldebaran-robotics.com>

aldebaran/libqi,aldebaran/libqi,aldebaran/libqi