Candera Engine 2D

Removed limitation of 256 layers for photoshop export/import

Return and parameters type for Node2D::SetRenderOrderRank, Node2D::GetRenderOrderRank and Node2D::GetEffectiveRenderOrderRank have been changed from Int8 and Int16 to Int.

LayoutingRectangle and BoundingBox calculation

LayoutingRectangle and BoundingBox are always computed from the first effect in the chain, if it is or contains a brush. If an effect is a combined effect it forwards the call to it's contained brush effect.

Added Computation of Perspective Warped Bounding Rectangle

A method for computing perspective warped bounding rectangle has been added to Math2D class.

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