Original code within ORIGINAL ifdef. New code within NEW ifdef.
DropTol structure marked with KOKKOS_INLINE_FUNCTION and default values are hard coded.
Default Algorithm and Cut Drop Algorithm split into separate for loops in NEW code.
Cut Drop converted to use Kokkos nested parallel loops.
Timers placed in new code and are commented out.
Code passes current unit tests.
Saw a speedup of about 1.5x with Cuda and 1.2x with Serial when running unit tests with 10,000,000 rows.

Signed-off-by: Ian Halim <[email protected]>

DropTol structure in algorithm replaced with new, smaller DropTolKokkos structure.
Computations are now done on the fly.
Code passes current unit tests.
No significant change in speed.

Signed-off-by: Ian Halim <[email protected]>

Per Christian's request.
DropTolKokkos structure removed and replaced with view indices and view of drop flags.
ORIGINAL code removed.
BuildKokkos removed.
Removed commented out timers.
Added comments.

Signed-off-by: Ian Halim <[email protected]>

Signed-off-by: Ian Halim <[email protected]>

Signed-off-by: Ian Halim <[email protected]>

Issues listed above have been addressed.
Threshold has been redefined to 1/threshold.
Unit tests have been modified to be more thorough.

Signed-off-by: Ian Halim <[email protected]>