Change the shader itself so that the effects look nicer and are more
consistent across settings.
Rework the water mesh generation (simpler system). Fix a few issues.
May work oddly with Atlas since I haven't been able to compile yet.
Refs #1875 (maybe fix), Fixes#2077 (I'll assume it does), Fixes#2114
(assumption again), refs #48.
This was SVN commit r15473.