Miasmata: Add water pixel shader
Miasmata: Fix water reflections (On high quality!!)

Previously we had to use low quality water, which looked pretty good, but
doesn't update the reflections in real time. Now we can do high quality water
with real time reflections :)

The reflections aren't 100% perfect (definitely better than low quality) - they
appear to hover slightly above the surface of the water, though this is really
only noticable if the ripples are removed.