[DF-185] Fixed crash for wrong textures at sceneinfo
"Shockwave" emitter type is introduced, old "Circle" one restored.
[DF-1059] Moved creation of ShadowRect to constructor
[DF-1051] Fix InstanceMaterialState::Clone()
[DF-1099] Add lightmapSize convertation from custom properties
[DF-1099] Merge commit