Add -> operator for SharedPtr, improve *.
Add -> operator for SharedPtr, improve *.

Change-Id: I801e53388cb646edc2528bebaf1ce2d3b7e5646c
Reviewed-on: http://gerrit.aldebaran.lan:8080/304
Reviewed-by: Herve Cuche <2a0975cc082cedff4d4350e3f6ec187146151bc6@aldebaran-robotics.com>
Tested-by: Herve Cuche <2a0975cc082cedff4d4350e3f6ec187146151bc6@aldebaran-robotics.com>

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