hector_quadrotor_gazebo: added message_to_tf publisher for estimated state if use_ground_truth_for_tf is false
hector_quadrotor_controller: fixed running multiple quadrotors in
different namespaces
hector_quadrotor_controller: added some output ports to quadrotor_controller gazebo configuration
hector_quadrotor_controller: added port rc
hector_quadrotor_gazebo: improved support for multiple quadrotors with different namespaces in spawn_quadrotor.launch file (requires roslaunch 1.9.48 or later)

Conflicts:

	hector_quadrotor_gazebo/launch/spawn_quadrotor.launch
renamed hector_quadrotor_urdf package to hector_quadrotor_description to follow ROS standards and moved plugin configuration files to hector_quadrotor_gazebo/urdf
removed dependency from hector_common and added hector_localization instead
removed dependency from hector_common and added hector_localization instead
Merge branch 'groovy-devel' into hydro-devel