Crazily this seems to help underwater curtain on vulkan

For me the curtain was not appearing unless i unrolled this loop..

Merge pull request wave-harmonic#349 from daleeidd/master

Fix "Missing Profiler.EndSample" error

Use quad to update persistent data

Fix shader errors introduced by gpu gerstner waves

These didnt appear until i did a re-import.

Fix benign warnings

wave-harmonic#120 - Fixed initialisation of planar reflections

Thanks @ibbybn!

Update OPTIMISATION.md

Added option to freeze game time.

Made cam controller work when game frozen. I guess i should remove the freeze waves option.

Related to wave-harmonic#38

Freshened up the readme a little

Duped license file in location of core files