V.4.0.1.N.00.B. PickerAgent now selects the closet robot. Extraction of the
robot position is done via converstation and no more using the service
description.
V.4.00.1.N.00.B. RobotAgent now reply messages and sets conversations
with the picker. The behaviour localization has been extended to actually
inform the picker where the robot is, meaning that the service description
property parameters is useless.
Merge branch 'master' of https://github.com/dieg0-/mas-2014ws-project