Add hitTest/pointInside support to table node

[christianselig]

Since ASTableNode's backing view (ASTableView) is a direct subclass of UITableView rather than ASDisplayView, the table node doesn't get any of the nice hitTest/pointInside methods linked up. Well, I mean you can override them in a subclass, but they're never called.

This PR simply applies the same rerouting from ASTableView to ASTableNode that ASDisplayView does to ASDisplayNode so that they're properly communicated.

[CLAassistant]

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