Major updates to fix context in iterable blocks. Context is now stored in an array, with the most local context at index 0. Changed everything to pass context arrays around by reference. Added internal function for recursive render calls, allowing the top level to take a single view object, but all internal calls to expect a context array.
Major updates to fix context in iterable blocks. Context is now stored in an array, with the most local context at index 0. Changed everything to pass context arrays around by reference. Added internal function for recursive render calls, allowing the top level to take a single view object, but all internal calls to expect a context array.

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