Update for Starling 1.4.
Removed AGALMiniAssembler as it's now part of Starling.
Reformatted code in AdvancingFront due to some syntax check errors in Flash Builder 4.7.
Source and destination blend factors can be set externally.
Special parameter 'selfShadow' in ShadowGeometry which can make make shadow to be rendered around object. Method 'removeShadowGeometry' does not dispose shadow geometry.