View rendering

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View rendering is compatible with iOS native API.

CB.Renderer is responsible for DOM manipulation.
CB.View is the base view class. It has a property named 'layer', and layer is a jQuery DOM object.
CB.Window is a subclass of CB.View, and it represents $("body").
CB.Rect is analogous with CGRect.
CB.Point is analogous with CGPoint.
CB.Size is analogous with CGSize.