Fixed boost::filesystem helpers in Boost <= 1.48.
Fixed boost::filesystem helpers in Boost <= 1.48.

personalrobotics/or_urdf,hoergems/or_urdf,hoergems/or_urdf,personalrobotics/or_urdf,cdellin/or_urdf,cdellin/or_urdf,hoergems/or_urdf,cdellin/or_urdf,personalrobotics/or_urdf