Also fix deadlocks that occur when portals are not destroyed
in time.

Should make the code easier to read.

Previously it used a version of the decode routines from lodepng
inside the decode functionality.

To simplify using the ScopedRuntimeDeviceTracker it now takes the
device id you want to run on during construction.

Code extracted from:

    https://gitlab.kitware.com/third-party/diy2.git

at commit f7a68da4fbe93ae7a8699b66f125a98ace842998 (for/vtk-m).

Rather than force all dispatchers to be templated on a device adapter,
instead use a TryExecute internally within the invoke to select a device
adapter.

Because this removes the need to declare a device when invoking a
worklet, this commit also removes the need to declare a device in
several other areas of the code.

Code extracted from:

    https://gitlab.kitware.com/third-party/taotuple.git

at commit ae4936580baf117373e73c23f0f8407d7589e6ff (for/vtk-m).

Also cleaned up some lingering type typedefs.

The new and improved vtkm::cont::ColorTable provides a more feature complete
color table implementation that is modeled after
vtkDiscretizableColorTransferFunction. This class therefore supports different
color spaces ( rgb, lab, hsv, diverging ) and supports execution across all
device adapters.

adding 2d ortho support to ray tracing and updating WireFramer to support 2d lines and 1D line plots

Sandia National Laboratories recently changed management from the
Sandia Corporation to the National Technology & Engineering Solutions
of Sandia, LLC (NTESS). The copyright statements need to be updated
accordingly.

This is to maintain compability with future minor releases

This allows for the line rendering to be shared for other use cases like
`WorldAnnotator`

This commit converts `Canvas` from an abstract class to a concrete
class by converting the pure virtual methods to empty/default
implementations. It provides an implementation for `Canvas::AddLine`
using Bresenham's line drawing algorithm.