Catkinized stack hector_quadrotor and integrated hector_quadrotor_demo package from former hector_quadrotor_apps stack
added changelogs
hector_quadrotor: updated rosinstall file to point to the catkin branch
hector_quadrotor_gazebo: added dependency to package robot_state_publisher
hector_quadrotor: added package hector_quadrotor_pose_estimation
hector_quadrotor_model: fixed header installation
Merge branch 'hydro-devel' into catkin

Conflicts:
	hector_quadrotor_gazebo/manifest.xml
hector_quadrotor_pose_estimation: added cmake target dependency on hector_uav_msgs_generate_messages_cpp