Make accessible non-copyable
Change serialization for Scene
Fix failing MassSpring*DRepresentationTests.Init*DTests.

- Update the test case to test the boundary conditions interems of dof ID.
Merge branch 'fix/mass-spring-unit-test' into 'master'

Fix failing MassSpring*DRepresentationTests.Init*DTests.

+1: Julien Lenoir, Ryan Beasley, haizhouW

Merged-on: https://www.assembla.com/code/OpenSurgSim/git/merge_requests/866623
Small Review Fixes
Merge branch 'feature/accessible-non-copyable' into 'master'

Prevent Accessible from being copied

Merged-on: https://www.assembla.com/code/OpenSurgSim/git/merge_requests/851773