Fix race condition bug in mappings and enhance performance

See merge request iMSTK/iMSTK!332

Parallel PBD constraint projection

See merge request iMSTK/iMSTK!324

# Conflicts:
#	Source/DynamicalModels/ObjectStates/imstkPbdState.h
#	Source/Solvers/imstkPbdSolver.h

Change header guard macro to #pragma once for all header files

See merge request iMSTK/iMSTK!331

Fix module test and refactor SPHFluid example

See merge request iMSTK/iMSTK!328

REFAC: Add warnings when certain type of geometry is not supported in vulkan backend

See merge request iMSTK/iMSTK!330

Remove duplicate cmake file

See merge request iMSTK/iMSTK!326

Add back-end mode for simulation manager

See merge request iMSTK/iMSTK!312

BUG: Use vtkPolyData instead of vtkPolyLine for VTKdbgLinesRenderDelegate

See merge request iMSTK/iMSTK!325

a. Move the scene simulation logic to scene class.
b. Simulation manager calles scene::advance() in the run module
c. Add launchModules() to scene meant to launch scene-specific modules in a separate thread

Parallel collision detection and handling

See merge request iMSTK/iMSTK!323

Merge remote-tracking branch 'origin/ParallelCollisionDetectionAndHandling' into ParallelPBDConstraintProjection