Merge branch 'depth-of-field-static' 

Update ReadMe with new rendering features Added new features for clear coat rendering, chromatic aberration, and depth of field effects.

Comment fix. 

Removed debug drawing facilities from FluidEmitter2dDispatcher. 

Merge pull request #1172 from Happypig375/patch-37 Report out of bounds particles in FluidEmitterMessage

Using appropriate API for FeelerFacet. 

Log warn updates. 

Decided to rename new Batch concept to PreBatch. 

Updated metrics time due to recent introduction of need to traverse t… …hrough nodes occupied by omnipresent elements.

Fixed #1062.