Basic Tree structure, made up of TreeNodes, each of which has TreeData for storing extra information.
Merge branch 'feature/aabb-tree' into feature/add-aabbtree

Conflicts:
	SurgSim/DataStructures/CMakeLists.txt
Add AabbTreeData and basic functionality
Adding IntersectionVisitor
Documentation updates
Use the new Aabb type inside the octree
Add a static ode solver
Add a pose to the SceneElement
Add constant accessor getSceneElement to Component
Representation's pose dependant on the SceneElement

Calling getPose on a Representation now returns the combined pose of the
Representation (get/setLocalPose) and the SceneElement's pose. The local
pose is the pose of the representation with respect to the SceneElement.

Also, now physics representations can 'drive' the scene element. Using a
DriveElementBehavior the pose of the physic representation will provide
the pose of the element. So other representations' poses will be updated
as the physics representation updates the element pose. There is
similarly now a DriveElementFromInputBehariour that allows an input
component to drive an element. These two behaviors remove the need for
the TransformPoseBehaviors.

Removed MockObjects from Blocks since the only place these MockObjects
were being used was actually in the Framework Unitests. So moved the
objects from blocks MockObjects in the MockObjects in Framework.

Updated all unit tests and examples to reflect these changes.
Add Camera to View Element

Add a camera to the ViewElement so it can be posed more intuitively.
Since Representation (which a Camera is) can be posed by there elements,
this provides a SceneElement for Camera's to live in.  This should be
easier than the default camera (that does not live in a SceneElement).
Since the ViewElement (which is a SceneElement) has a pose, you can set
the ViewElement's pose, and this will move the camera. Instead of using
the less intuitive setLocalPose of the camera, and assuming that it
isn't accidently in another SceneElement that could get posed.
Cleanup Bouncing Balls Example
Fix VisualizeContactsBehavior not respecting element pose

VisualizeContacts get the contact position in the global coordinates.
However, the vector field representation lives in an element that could
have a pose. So we need to put the vertices of the vector field in
element coordinates.
OsgMeshRepresentation was not calling its parents update

OsgMeshRepresentation overrided the update call instead of implementing
the doUpdate call. This resulted in the m_transform not getting updated,
and moved according to the global pose of the representation. This
change just implements the doUpdate, so the OsgRepresentation::update
will get called.
Fix whitespace and comment issues from pose changes

Fixed some long line lenght, trailing whitespace, and missing explicit
in a constructor.
Fem2D mechanical validation suit tests
Fix Linux error and warnings in Fem2DRep unit test
Fix cpplint warnings in Fem2DRep unit test
Merge branch 'master' of git.assembla.com:OpenSurgSim into feature/fem2DValidationTests
Add Fem2D example