added missing dependency on geometry_msgs
added object, threshold, attractor fields to motion phase message
Resolving conflict with Francois
Updated authors.
Added .gitignore
Removed package.xml that was irritating catkin_make and added Makefile
Added field to GraspStabilityControl service
Comments on messages/interface to SoT
Add the pointing_at Constraint, put other as the first Constraint.

The goal of this modification is to avoid changing
the index corresponding to 'other' and having to adapt
every ros node depending on this message.
Remove useless element from ConstraintCommand.