Feature/subhasis/zfp cudastream

[subhasis-shell]

Incorporating cuda stream as default design

[lindstro]

@subhasis-shell Thanks for this contribution. We've been working on a complete overhaul of the CUDA backend on the staging branch, so it will be difficult to pick up this PR on the develop branch at this point. Just skimming the changes, they don't look all that substantial, but we can't really merge this PR as is without introducing significant conflicts with our changes on the staging branch.

Do you think you could resubmit this PR once all of our changes have trickled through to develop? This should happen in the coming weeks.