ApplyPathNodeVisitor helper classes don't need to be noncopyable, just non-assignable.
ApplyPathNodeVisitor helper classes don't need to be noncopyable, just non-assignable.

This is because of reference members - otherwise MSVC whines about not being
able to generate the assignment operator. On the other hand, noncopyable
had broken the build on Linux with Clang.

Armada651/OSVR-Core,Armada651/OSVR-Core,d235j/OSVR-Core,godbyk/OSVR-Core,Armada651/OSVR-Core,leemichaelRazer/OSVR-Core,d235j/OSVR-Core,feilen/OSVR-Core,feilen/OSVR-Core,Armada651/OSVR-Core,feilen/OSVR-Core,Armada651/OSVR-Core,d235j/OSVR-Core,d235j/OSVR-Core,leemichaelRazer/OSVR-Core,feilen/OSVR-Core,OSVR/OSVR-Core,leemichaelRazer/OSVR-Core,d235j/OSVR-Core,godbyk/OSVR-Core,OSVR/OSVR-Core,godbyk/OSVR-Core,godbyk/OSVR-Core,godbyk/OSVR-Core,leemichaelRazer/OSVR-Core,OSVR/OSVR-Core,leemichaelRazer/OSVR-Core,OSVR/OSVR-Core,OSVR/OSVR-Core,godbyk/OSVR-Core,OSVR/OSVR-Core,feilen/OSVR-Core