Add stapler collision mesh into StaplingExample.
Replace the collision mesh of stapler with a simplified convex mesh
so that its inertia mass would be calculated properly.

and also adjust VTC's parameters for this new collision mesh.
Replace collision mesh of the stapler with correct version and tune VTS's paramenters.
Merge branch 'master' of git.assembla.com:OpenSurgSim into wip/collisionMesh-stapler

Conflicts:
	Examples/ExampleStapling/main.cpp
Move arm collision mesh from Collision folder into Geometry folder.
Remove duplicated header file.
Merge branch 'master' of git.assembla.com:OpenSurgSim into wip/collisionMesh-stapler

Conflicts:
	Examples/ExampleStapling/main.cpp
Add correct collision meshes for the arm and stapler that has been
rotated to align with its scenery ones.
Set initial poses for scenery and physics representations of the stapler.
Align arm collision mesh with arm scenery mesh.
Use collision mesh for staple instead of capsule.
Add collision representation for staple
Merge branch 'master' into wip/collisionMesh-stapler
Fix character case in header which cause Linux build failure
Add data files for upperarm, remove unused forarm.mtl
Revise StaplerElment

1. Use SurgSim::Framework::ApplicationData to check file.

2. Remove name duplication when naming representations.

3. Coding style revision.
Remove 'm_' from local variable
Revise StaplingDemo

1. Use SurgSim::Framework::Application to check if files exist.

2. Lower arm (and FEM wound) instead of stapler, so that the whole
   stapler could be seen in the window.

3. Remove duplication when naming variables.

4. Load upper arm into the demo.

5. Use 'const &' to pass function parameter.
Merge remote-tracking branch 'origin/master' into wip/collisionMesh-stapler
Merge branch 'wip/collisionMesh-stapler' into 'master'

Add collision mesh to the stapler and staple

Merged-on: https://www.assembla.com/code/OpenSurgSim/git/merge_requests/747993