Add Ocean OpenCL-OpenGL interop demo

[starcatter]

For comparison purposes with #110

The sample follows general steps (with multiple optimizations) described in the publication: Realtime GPGPU FFT ocean water simulation

Main focus of the sample is to demonstrate how to share compute/render resources between OpenCL and OpenGL to simulate an ocean surface.

[CLAassistant]

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:white_check_mark: starcatter
:x: Piotr-Plebanski-Mobica
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[bashbaug]

Hi @starcatter, thanks again for your contribution. Do you think you will have a chance to address the review comments above? Thanks!

[starcatter]

@bashbaug Hello, sorry if I was a bit unresponsive! Those are good suggestions, I'll try to get them implemented this week.

[starcatter]

This is great work and I think we should try to get it and #110 in for the next release.

This PR seems to share a lot of files (e.g. OpenCL kernels) with #110. Should they be renamed so they are distinct? Or, is the intent that both samples will share the same OpenCL kernels?

Yes, the intent was to use the same kernels in both samples. Only the shaders have subtle differences.