A simple row and column data store that supports transactions (non-nested). The transaction cache has two implementations (TransactionDictionaryCache and TransactionOperationCache) in order explore
the differences between storing transaction changes are a list of operations vs. a simplified dictionary of dictionaries.
Stores the transaction changes in a dictionary of dictionaries along with a separate set that tracks what rows where deleted.
Stores the transaction changes as a list of operation for each row. These operations are replayed on the backing row to produce the final row to commit or print.