Merge pull request #317 from isura/hydro-devel

Added method to get pointer to force/torque sensor by name
Merge pull request #318 from isura/hydro-devel

added missing name_ to ForceTorque class
missing link flags for required libraries are added.
urdfdom include dirs are added to include directories.
1.8.9
Merge pull request #319 from muratsevim/hydro-devel

missing target_link_libraries commands for required libraries are added.