add to_list method to the Table class. #436
                
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Issue #, if available: Issue
Description of changes:
Added a private(intermediate) method called _process_table, which pretty much retains the code from to_pandas.
Using this new method created to_list method and refactored to_pandas method.
This change provides an easy to_list method to get the table into a list of rows, which having to use pandas as a dependency (which can add ~80 MB against the AWS Lambda's 250 MB limit).
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