Bug fix with launch scripts
Python Pr2 re-derives from AbstractHumanoidRobot
Bug fix on gaze task
Add a waist task template in pr2_tasks.py
Replace RosSotRobotModel with the modified RosRobotModel from dynamic_graph_bridge
Correct order of the initialization list to remove warnings.
Add a note in the python script to help understand a crash.

Since the model of the pr2 is read from the urdf,
it is mandatory for that parameter to be defined BEFORE
starting a sot python script involving pr2.
Install the sample scripts in the tutorial folder.
Add a controller using the pr2_controller mechanism
Merge branch 'groovy' of https://github.com/bcoudrin/sot_pr2 into groovy

Conflicts:
	src/pr2_sot_controller.cpp
Add base control through base_controller and base_odometry
Add velocity control
Fix base control adding odometry feedback
Warning removal.
Remove extra target_link_libraries
Simplify the pr2_tasks script by using pre-existing solver class
Merge pull request #1 from francois-keith/groovy

Warning removal and uniformization
Change default position to avoid singularities
Add custom pr2 description for simplification
Merge branch 'groovy' of https://github.com/bcoudrin/sot_pr2 into groovy