Add a get_all_list_data utility function that uses a get_next generator function to retrieve all json data for methods that return a list and support pagination.  Include tests and function doc.
Add doc line to state that intermediary results will be lost in the event of an exception being thrown part-way through paging over result set.
Merge pull request #16 from Harvard-University-iCommons/feature/get_all_take_two

Add a get_all_list_data utility function that uses a get_next generator ...