from SimMedTK to iMSTK.

Modify the license notice in each file.
Add LICENSE file.

from SimMedTK to iMSTK.

Modify the license notice in each file.
Add LICENSE file.

Revert some changes and make it build, run FEMSimulator example

CollisionContext/CMakeLists.txt was contributed by Sreekanth.

Cherry-picked from Ricardo's edits to MeshMap related
classes in addCollisionContext branch

BUG: Fix compilation errors all over the place

ENH: Adds code to find islands

Adds code to find and list members of islands

WIP: Adds code to do stage-2 assembly

ENH: Change the mesh representation of scene objects

Adds three mesh representations for discrete geometry
for each scene object. Also adds mesh maps

Conflicts:
	Assembler/Assembler.h
	Collision/MeshToMeshCollision.h
	CollisionContext/CollisionContext.cpp
	CollisionContext/CollisionContext.h
	Core/AnalyticalGeometry.h
	Core/SceneObject.cpp
	Core/SceneObject.h
	Mesh/MeshMap.cpp
	Mesh/MeshMap.h
	Mesh/MeshMapAffine.cpp
	Mesh/MeshMapAffine.h
	Mesh/MeshMapTetToSurface.h
	SceneModels/UnitTests/VegaFEMDeformableSceneObjectSpec.cpp

Add an alias for a matrix map.
Create a templated method in the MeshModel and IOMesh to automatically
cast the underlying mesh.

Create an interpolate() method in the VegaVolumetricMesh class to
interpolate surface of the underlying volumetric mesh with an external
surface mesh and clean up the interface.

Create a computeGravity() method in the VegaVolumetricMesh class
to compute gravity forces.

Refactor getVelocity() method in DeformableSceneObject and add a
variable to hold the gravity vector.

Refactor SceneObject. Add SceneModelRenderDelegate render delegate to
take care of renderign operations for this model. Create visual,
physics and collision model variables.

Remove render delegates from the StaticSceneObject, this is now handled
by it base class.

Add storage for the gravity force in VegaFEMDeformableSceneObject and
initialized properly. Compute internal force by multiplying K*positions
instead of calling the vega function.

Refactor DefaultSimulator, VegaFEMModelSimulator. This class will be
marked obsolete soon.

- Also replace GL/glew by vtk_glew in Core/RenderDetail
- Remove empty first line in those

- Remove RenderDetail::setTextureFilename() and co.
- Remove MeshModel::addTexture()
- Remove SurfaceMesh::assignTexture() and co.
- Use RenderDetail::addTexture()

Still need to assign texture in model?

The 3ds file loading and attachment  of VAO for the tangents
for 3DS file are working fine now.

Clean up and add static scene delegate.

Add tests to IO. Move variables, types and implementation
of utility methods to IOMeshDelagates base class.

Commented out the VegaVoumetricMesh test until after I debug the meshIO.

This data mapper allows you to map external data into the
vtkDataArray.
This in turn allows you to interface with vtk without
repacking the simulatordata.

Clean up and implement a pimpl VtkRenderer to hide
redering implementation.

Replace core::StdVector3d with std::vector<core::Vec3d>

because eigen 3d vector array is aligned
by default so no special allocator is needed. See core::StdVector3d
for more details.

Also renmamed many unseen sm* class names.