Added the urdf_string parameter to parseTransmissionsFromURDF().
Added the robot_namespace and urdf_model parameters to initSim().
Added "joint_limits_interface" and "urdf" to the build dependency list.
Additional parameters are passed to robot_hw_sim->initSim(). These parameters
are used by the joint limits interface.
Added "joint_limits_interface" and "urdf" to the component list.
joint_limits_interface is now used to enforce limits on effort-controlled
joints.
Merge remote-tracking branch 'upstream/hydro-devel' into hydro-devel
Eliminated a joint_name variable and replaced it with joint_names_[j].
Modified some lines so that they fit in 100 columns. These changes were made
in order to be consistent with the rest of the file.
Merge pull request #119 from jim-rothrock/hydro-devel

gazebo_ros_control now uses joint_limits_interface